I just got to home audition SA103. Paired with ARC ref5, the mids and highs are sublime. Incredibly detailed and sweet at the same time. The bass, however, is not so controlled. But I am used to Krell bass
In A/B mode, it runs very cool even after couple hours. It feels cooler than MC601's at similar load. BUT, hit that A button, you can fry an egg on it. It gets extremely hot, even after 5 minutes.
Well, back to more listening