S60 responding time?

hi!

i am currently using noia 3230 but the program responding time is not that fast.
I meant whenever i click on a new program, it always takes just a little be longer to activate??
Is it cuz s40???
wut about n80???

i am thinking of buyign new cell w900i, n91, or n80 r my optioin so far.

any comment is appreciated

Thank you!