That's done great feedback about the GS3. We'll have 7 of them at my office tomorrow. I put 5 of my guys into iphones. I've been holding my breath and hoping that the SG3 decision I made for everyone will pan out. It's good to hear that you've had a positive experience so far.
The original poster has good reason to trust the build quality and radios of Motorola and unfortunately there's not a ton of feedback for the SG3 yet.
If the Max HD ever comes out, it will be very comparable to the SG3. The The Razr Maxx is available now, will continue to drop in price over time and has the best battery. The longer you can wait, the more feedback you can collect on any issues with the SG3, the more the price will drop on the Razr Maxx, and probably in three or so weeks, some more decisive information will be released about the Maxx HD.
This is rather maddening trying to make sense out of it all. I'm thankful my my GS3 is finally here tomorrow.