Just Received mine on Friday and I've had the weekend to test it out.
In my experience this is the best performing smsl amp. I own the sa-36, sa-60, and sa-160 as well as the a2.
The sa-160 is really powerful and sounds great. However, the power brick is massive, it really is overkill for 90% of speakers on a desk, and there was a slight high frequency whine that never went away.
The sa-36 sounds great, maybe a little warmer than neutral...