yup...for music-lovers...i would recommend w800ithan to
k750i...
I'll choose k750i over w800i coz i'm not those music-lovers...as
long as the applications suit me, it's fine....
In fact, i've just purchased k750i today n i pretty like it for its
functionalities n capabilities...for my usage, that is... 
So, for those non-music goers, i would recommend
k750i...hehe....whereas, music-goers...go for w800i....haha...if
possible, u've spare cash..well....w900i.... 