Form factor is important? u like to slide? twist? or just a candy bar?
in terms of OS, i prefer smartphones though they have a tendency to hang more often.
But with smartphone u can have many application for u to DL. GAMES, APLLICATION, TONS of S/W.
If Price is the matter. K750 is a good buy, 2MP.autofocus MP3, RADIO, small. RM650 is the lowest i've seen in LYN of coz. Original. Not sure bout the rest. goto tradzone u can find out from there.