for my part i had a loooot of PDAs.

- Palms : Zire1, Cliés SJ20, SJ30, NX70V, NX73V, NX80V, UX50, TH55, VZ 90, Palm TX
- Pocket PCs : Toshiba E310, Asus A620, A620 BT, Fujitsu Loox 720, Acer N310, Qtek 9000, HTC X7500, HTC Diamond Pro
- Some others : Zaurus 3100, 800, 860, NTT Sigmarion III, Newton 2000 & 2100 ... iPhone edge, iPhone 3G, Nokia E90, N800, N810

... Ok, i'm really insane ...

But the N800 & N810 are the BEST for eBook reading.
And Maemo is the BEST OS for a pocket device I ever used.
And N810 is the best hardware of all these PDAs, even if it's not perfect at all.