I gave up my local version of the Samsung Galaxy S2 and got a T-Mobile S2. I have no regrets at all since the phone's build is a lot more premium, the screen is a little wider at 4.52 in. (with no issues, surprisingly!) and it's 4G-enabled. Also, I'm glad that I've finally gotten rid of my old S2's hardware home button. I'd always had issues with it.
I may not get as much dev. support for T-Mobile's version of the king phone but I'm very happy with it. The screen issues that plagued my local S2 are nowhere to be found in my new toy. Hurrah!
Does anyone here have or is planning to get the same phone?