I get that, I was just thinking out loud. In my case, I'm looking to use T-Mo exclusively, so it's worthwhile to consider my options. Unfortunately, I don't really like like any of T-Mo's phones, which is why I decided to venture into the dark and treacherous realm of BYOD. I think right now I have it down to the Spectrum 2 or the Sony Xperia ZL.
As far as the Spectrum goes, I took another look at it and realized it cannot use 1700/2100 MHz UMTS. Neither can I find any reliable info on T-Mo's refarming efforts. So that's a bit of a dark horse. I'd hate to pick it up only to be limited to 2G. Admittedly, I'm usually using wi-fi anyway, but still.