I got the 8x from TMO this morning. I tried getting a 920 from AT&T (current TMO subscriber) but it was impossible, so I went with the 8x. So far its an amazing phone! It feels amazing in the hand, and is MUCH faster then my HD2 (running WP 7.5). My only complaint are the buttons. The power is hard to hit at the top of a VERY tall phone, and I keep hitting volume or camera when holding the phone hard enough to even press the power.
Also, I need to get a case. The soft plastic they use is easy to scratch up, even from another plastic device. There are no good cases yet sadly. Nothing but cheap Chinese plastic POS cases.