The iphone 4s.

Unless your'e filthy rich , Go For It !but if not , take some time to answer these questions

. Do you need a phone twice as fast as normal phones ?
Phones these fast are normally for games and huge multitasking on big apps. Will you be needing all those processing power ?

. Do you frequently use your phone as a camera / video camera ?
If that's that reason you want the phone , isn't it better to get real camera ? Do you really use it ? I know it sounds very tempting to buy , I mean 1080p ! but will you take full advantage of it ?

. Are you willing to pay for a phone , ( without package ) , close to $1000 ? that's how much it costs in my country. 1000 ain't cheap and if you won't be taking full advantage of the apps , the processor , the camera , I'd say don't

I know it's pretty attractive with it's higher density of pixels in a small screen , with it's high processing power , camera , OS and stuff , but don't if you won't be taking full advantage.

There's always the Iphone 4. A little slower , although camera can never beat the 4s , and may look less attractive , that's the second best thing in my opinion for something cheaper. Yes It loses to the 4s , but the price of it will continue to drop :)