My 16 year old Bryston 4B 250w x 2 and 19 year old Bryston 2B 60w x 2 seemingly sounds better or as good as my 2 year old Rotel RSX1065 100w x 5. Thats why I use my 4B for mains.
My 23 year old Bryston 3B is another story. I think beer accidentaly fell into it. It smells like that when the amp gets warm.

http://www.quadloft.com/hometheater- new HT