seriously i feel all the more you shouldn't get the ipod nano.
not because its lousy but because you can't give a good enough
excuse to buy one. there's always a difference between a need and a
want 
if you wanna talk about sound quality, go for better earphones. if
its design you're going for, go for ipod. don't degrade creative
just because they ipod looks better than creative. creative pwns
ipod in terms of sound quality for your info.
and i don't really know how a walkman phone can pwn an mp3 player
in terms of sound quality
furthermore its a k750i quite an old model.
try getting the samsung mp3 player. the one with in-built speakers.
personally i feel that one not bad in terms of design. sound
quality wise, not really sure about it.