I go with G-Benz, you can find them on ebay. Harmon Kardon pre-1990 models are also good buys, I use two HK Citations (70's or 80's vintage) , one for front set of Klipsch towers and one for the rear set, I think I paid like 75$ each for them at the local pawn shop, they sound great driving my Rotels, the neighbors call the cops all the time to tell them how great they sound.