Here goes:
N95 -
+great screen, 24-bit, great interface and keypad, great sound (camera is not a priority for you but is very good), wifi, Interface is quick
-No touchscreen though, slider quality is a little iffy IMO.
IMate KJam - + big screen, touch controls, WM, fully keypad that is functional, good proccy
-one handed operation not possible, screen crispness not all that gr8 once u see the n95, e70 etc
(all these class of PDA's come with wifi etc, close your eyes and select if this is a criteria)
N93i - don't even think about it!
E61i -
+good feature set, great keypad, apps, wifi, decent proccy, awesome battery life.
-wideass form factor
E90 -
+ Damn productive, good screen, functional as hell from my 5 min with it
- large compass box FF hasn't changed, heavy...
Wait a bit and see:
W960i -
+good camera, good keypad, music should be good, touchscreen
-After launch we'll see.
A word - IMO QWERTY is useless unless u type a lot in word etc. touchscreen/stylus is more a "chamkaao" gimmick than anything and doesn't really aid productivity. I can type just as fast on my old 6630 as on my jasjar for example for up to 300 words or so. Anything longer regularly and a qwerty makes sense.
Stylus as I mentioned just ensures two handed operation and is largely gimmicky, I am a former P910i owner, and have owned a K-Jam and a Jasjar so feel qualified to comment...
If you want a great phone go with the flashy N95 which has all the bells. You want great functionality then go WM. Nothing beats the tiny K-Jam/O2 Mini S, cause of the full size QWERTY, which POS' like the O2 Atom miss out on...
N80 also has a lot of features, well built good screen, but grossly cheap for a loaded party like you!!