Kindles, which one should I have?

This might be one of the most frequently asked questions:
First read AMAZON's compare chart
Still hard to decide?   Please continue reading through to the end for simplified conclusions.

1. $139 Kindle Keyboard 3G:  This one is the third generation model. Before and during the blackfriday, there is $85 (in target)  deal and $89 ( BestBuy )  deal.  It looks like K3 is too old, but actually not really. I have Kindle Keyboard WiFi and 3G and like both of them. If you prefer physical keys and need to travel very often, K3 3G is not a bad idea. One more thing, it has real 3G which means you may use internet where there is 3G network coverage in this planet. This is the selling point considering the new kindle family does not support the real 3G.
2. $79 Kindle, Wi-Fi, 6" E Ink Display - includes Special Offers & Sponsored Screensavers: This most basic value 4th generation model delivers access to all Kindle books and sports a 6-inch screen. Books are delivered over Wi-Fi in under a minute. Ads are displayed when browsing new titles. It weighs under 6 ounces, holds 1,400 books and offers a one-month battery life which is only half of the Kindle Touch's.  It does support both tex-to-speech and Portrait/Landscape mode. It does not have the keys as K3 keyboard, you have to resort to the soft keyboard. 
3. $99 Kindle Touch, Wi-Fi, 6" E Ink Display - includes Special Offers & Sponsored Screensavers: Same screen size as the $79 Kindle  and adds touch-screen navigation, reducing buttons down to one for on/off. Wi-Fi for downloading, no ads, weighs 7.5 ounces, holds 3,000 books and has a two-month battery life. So it has as twice battery life as the basic kindle. Alert!!  kindle touch doesn't have landscape mode, if you read a lot of PDF files, this is not the good one for you. While kindle keyboard does have this feature. It might be easier for some to use the dictionary by touching and holding compared to the cursor moving on kindle keyboard.  It does support tex-to-speech but DOES NOT support  landscape mode.
4. $149 Kindle Touch 3G, Free 3G + Wi-Fi, 6" E Ink Display - includes Special Offers & Sponsored Screensavers: has 3G connection for downloading books when no Wi-Fi is available. It will not be able to browse the Internet without a WiFi connection. Users will still be able to use 3G to sync book and document purchases, but anything beyond Wikipedia will be off-limits  It’s slightly heavier at 7.8 ounces, but otherwise is the same as the $99 model.
5. $199 Kindle Fire, Full Color 7" Multi-touch Display, Wi-Fi: This is Amazon’s low-cost tablet and often is compared to the iPad, Nook Color/Tablet or Lenovo IdeaPad A1. The Fire  allows users to browse the Internet in full color via Amazon’s “Silk” browser. It also offers access to Amazon’s Kindle Fire android marketplace. You may be able to install some of the third party non Amazon market android apps on it without even rooting. Like the $500 iPad model, the Fire offers Wi-Fi connection only — no 3G available. The screen measures 7 inches. Amazon claims it will hold 80 apps plus 10 movies or 800 songs or 6,000 books. However, Amazon offers free cloud storage with all of its devices. The Kindle Fire weighs just under a pound at 14.6 ounces (After using my Fire for about two weeks, I like the lightweight best)  and offers 7.5 hours of video playback or 8 hours of reading and browsing time on a single battery charge. It is portable compared to those 10" tablets. Keep in mind, Fire is not the best device to read since it does not possess E-Ink technology.  With the case on Fire, it has almost the same size as the Kindle 3 with cover---like carrying a book (No!! actually you can bring thousands of books if you like).  At this time, I use my Fire to do the followings: surfing internet, streaming and watching live TV while working before my large screen desktop, reading books and pdf documents, and play the free games Amazon offered daily (Another wonderful feature why I like my Fire!!). Less  storage capacity does not bother me at all since I rarely download movies to device and play.  I did wish my Fire has camera thus I can capture some videos for my little ones and show them. Other than that, it meets most of my needs and I spent the amount of only one ipad on:   Fire ($131, sorry if this deal makes you upset, but even $199 is a slick deal) + Kindle keyboard ($139) + Kindle keyboard 3G (target $85+tax deal) + HP TouchPad ($99+tax) = $469 ($537 if paid by full for Fire) < $499 +tax =$545  (16G IPad 2).   How do you make your own choice? If you are an apple fan, I know your answer.    UPDATE: Apple is going to reveal its high-end new generation IPAD in Jan, and the current IPAD 2 will play with Kindle Fire. Is Kindle Fire the real IPAD killer? We still do not know the answer.                                                                       

In conclusion: 

• Physical keys, real 3G connection, book reader and frequent traveler ===> $139/(deal $85) Kindle Keyboard 3G
• Lower cost, lighter weight,  PDF documents to read  ===> $79 basic kindle
• Touchscreen, fewer PDFs to read, longer battery life, large amounts of books  ===> $99 Kindle Touch
• Need downloading books everywhere and use Wiki ===> $149 Kindle Touch    Not a good value 
• Reading PDF papers extensively ===> $379(deal $259) Kindle DX
• Doing more than reading, surfing internet, watching TV and video, reading magazines and newspaper in color, playing games, teaching kids, need portable and low cost tablet ===> $199 Kindle Fire       
• An alternative of Kindle Fire is B&N's Nook Color (Amazon, B&N) which has the same price tag ($199) now but have additional microSD expansion slot, and supports EPUB format,there is a newly released Nook Tablet (may be regarded as an updated Nook Color) with a listed price of $249+tax.