I have the KINDLE, Touch version BW and also the old one with Keypad (not touch). I Recommend the Kindle with Keypad (not touch), because the Touch don't have the Landscape functionality very very usefull for PDF Documents.
One of the advantages for the BW Kindle (basic with WiFi), it's the 1 Month Battery, you see it like a USB Disk, and also the AMAZON Account for New Buys work very well, also you can send Word or PDF documents through an email account like xxxxx@kindle.com, very usefull feature.
The KINDLE allow to have the same document and reading tracking in your PC, IPHONE, IPAD and KINDLE of course, sincronized!!! very kindle!.

it's my experience with it...