I've now managed to load Kindle PC on my computer and must admit it is very good. I've now decided to try and get one but I don't know if he standard 3G one is too small or the DX too big can anyone who has seen both give an opinion!!!!!!!!!!!!!!!!! !!
The Kindle has a 6" diagonal screen and I've seen it. The DX has a 9.7" screen and is substantially larger, more expensive and harder to get hold of. I'm not even sure you can get hold of the latest Kindle DX in the UK (I know you're not in the UK Keith). I've obviously not seen the third generation DX but I have seen the Kindle 3.
If you're reading books on it, it's absolutely fine unless you find 7,8, 9 words to a line really irritating and want 14 words to a line. If you're reading pdfs or browsing it's a fraction too small. For e-books there are 8 font sizes, three type faces, three line spacings and three settings for words per line. For PDFs and browsing there is 'fit to screen', 150% zoom, 200% zoom, 300% zoom and actual size. From what I could tell the greatest failing really was there wasn't a 125% zoom level which seems to coincide with getting rid of margins and a more comfortable text size whilst getting everything on the page in portrait. You can tilt PDFs and websites round to landscape mode though, that sort of doubles the number of zooms (if you see what I mean). I would imagine that the DX would be substantially better if one had worse eyesight than myself or my friend or just irked by the size and wanted to read shedloads of fiddly PDFs on it. The DX I'd imagine is more like reading a small magazine or hardback vs reading a small paperback.