I've got a couple of 1100s, 1150s, a 1200 and 2150. Of all, the 1150 was my fave, for both the browse-able bookshelf and ergonomic form factor.
Three things pushed me over to eInk, and the screen, though lovely, was the least important of the three. Mainly I hated the 128K Card limit and the short battery life.
I could probably handle the size limit now having adapted to carrying only a subset of books, since thanks to Sony's menu system, keeping your whole library on a honking big memory card makes your unit almost unmanageable, but the 10 hour battery life would still drive me nuts.
Nothing worse than getting to the last chapter of a book and having your reader go dead.