Howdy everyone, I was looking for your opinion as I have not found a place to place both these brands head to head. I'm looking to spend around 400 or so dollars on the used market for a 2 channel amp that I will not have to upgrade for a long while. The Adcom GFA-555 200 watt per channel seems pretty easy to pick up in this price range. How would this compare to a Rotel offering in the same price range. I'm open to other suggestions as well. The amp will power a pair of GR AV-3 (91db sensitive) speakers in a very large acoustically dampened room. I also like to listen at a pretty aggressive level 85-90dB at listening position (14 feet back from center) so good power reserves are a must. Thank you for your thoughts.