As far as I know Htc HD2 is the best phone available on T-Mobile. Its the best looking phone in the market. I personally think it looks better than the i phone as well. It is highly customizable and the best part of it is you can even Dual Boot android in this bad boy. And of course not to forget about big screen experience. The only down side is that it runs on Window Mobile. But XDA- developers are working on it to run android efficiently. Its just the matter of time.