I really wanted to get an Audio-GD amp, but their stuff have very splitted opinions outside head-fi. That makes me a little afraid. I've seen some measurements where it measures really bad. I know that measurements aren't everything but even so, that doesn't help making my mind.
The SA-31 is an awesome sounding amp(and that is coming from a" tube guy"). My favorite SS amp I own.(HUDA, HA-160, M-stage, O2, and Asgard 2 being the others)