HD2 on ATT?

[Gixxer29]

As of now, I currently have the Touch Pro 2 on sprint with sero and its great. The only problem is that I cant ignore that the HD2 is clearly the best phone in the WORLD!!! I've decided to bite the bullet and pick it up. The problem is that I dont know what carrier to activate it on, AT&T or T-Mobile. I know i will only get edge on both, but i would appreciate some feedback from users who currently have the phone in the US. Thanks a lot.