Guys i have made up my mind to get a smartphone or just say a good phone

 Can you guys please give me some suggestions to choose from any of these. After some research i have narrowed it down to these phones

 1. Iphone 3gs
 2. N900
 3. HTC touch pro 2
 4. Driod
 

If you are using any of these phones are similar phones like crackberry please give me some inputs so I can decide

thanks in advance...