[HonzaK]

Regarding PDFs:
I had the chance to test Kindle Keyboard and T1 side by side this week and I must say I was impressed with Kindle PDF capability (because everyone says it sucks) and less then impressed with T1's PDF capability (becaus everyone says it's good).
- Major point for Kindle: the darker/darkest font option for PDFs makes them way more legible than on T1, I could almost comfortably read them without any zooming at all.
- They can both display PDFs in landscape, which is very much ok for reading
- I don't compare panning when zoomed because it is useless anyway (on all e-ink readers)
- Major (sort of) point for T1 - it supports bookmarks (as in "Table of Contents"), but this has a drawback - whenever you click on a bookmark the reader (T1 I mean) stops respecting the PDF CropBox, therefore any white margins you cropped beforehand on PC reappear. This is apparently a bug/feature in the firmware which will never be fixed.
- Slight point for T1: it supports two-column view. I don't mind a little PC preprocessing with Briss or something similar so this isn't really all that importatnt for me.
- I don't compare reflow because it's useless anyway (for "real" layout-rich PDFs)

All in all, I think Kindle's support for PDFs is not much worse that T1's and because of the much better legibility, I actually prefer Kindle. So I would say - don't expect any big improvement if you migrate from KK to T1.