I need help picking out a smartphone..

Hi, my contract with AT&T runs out in about 2 weeks so I can finally switch providers and get rid of my god awful razr (ive had 5 of them). I am going to get a smart phone but I would like some opinions on which one I should get. My choices are..

Centro
Ace (Samsung)
Treo™ 755p by Palm
Treo™ 700wx
Mogul™


I am going to go with unlimited web/data and text messaging. I would like the phone that will offer me the best internet browsing, texting, and obviously decent voice quality is important as well (some free 3rd party apps would be cool too). I don't think I will go with the Mogul because it is $300 so I am leaning towards the Centro, Ace, or Treo. Any suggestions would be greatly appreciated. Oh and also please don't recommend any other phones because those are my only choices..

700W is said to be unstable.
Not much difference from the Treo™ 755p by Palm and the Centro except for the price.
I Luv my Treo™ 755p.

Well I would say either get the Centro or 755p. If you have small hands or want a smaller phone get the Centro vis versa on the 755p.

I am partial to Samsung phones, and would choose the Ace anyday, I had multiple palms and they always seem to crash, or lock-up, your main question should be do I want Windows Mobile or do I want Palm OS.

Chris