I'd recommend the original, American version. I'm running one on my quad and like it a lot. A few reasons to consider the 3DR / US version:
1. You're American, stop supporting China and show some support for your own country's businesses and economy. Also putting money back into the developers of this board gives them more R&D cash to develop better products for you and I. Giving money to China just supports more theft of our ideas.
2. The 3DR version comes with a power module which works great to keep track of mAh burned as well as supplying required voltage to your board and peripherals.
3. Highly recommend the $50 upgrade to the Ublox LEA-6 GPS. This thing is by far the best GPS I've ever seen (I've see a lot). I live in a 3 story house and this gets lock in the middle of my basement.