I've had several pieces of Adcom gear and liked them all. Still have a GCD750 (CDP), very nice. I had a GFA535II and thought it was an outstanding solid state amp. The more efficient the the speakers however, the brighter the amp sounded. I think it just needed to be working hard to sound best, and it can sure work hard. I used it to drive some very demanding AR-M5's and it worked beautifully, where a NAD amp with similar power rating sounds terrible. You got a nice piece of gear.