The simplest way I can answer is...

If you want to get trapped in to forever Apple zone, and keep paying enormous money for iPhone 1, 2, 3, 4...∞ then buy iPhone...

If you want to use your phone for at least 2/3 years (considering the fact that every quarter companies come up with new phones with something "different" (?))...then buy some smartphone worth $400/$500...

If you want to change your phone every year then buy some smartphone worth $200 (Nokia has many)...

User experience would always be traditional with all Nokia, Sony Ericsson, Android phones...though restrictions would be too many for iPhone...

Cheers,
~nV!