Well I have the original Surface Pro. It's a great machine...
Don't get me wrong it has it's problems, but for one machine it really does do everything. The main issue I have is not being to use bluetooth accessories at the same time as Wi-Fi as they used a completely s**t integrated chip for doing so.
I was looking into whether they changed this on the Surface Pro 2 and it seems like they might have, but no one seems to be able to give a definite answer.