i have a pair that are about 1 yr old. Love them! I previosly had the new Mcintosh MA-6500 integrated amp. I also auditioned: Plinius, Classe (ca-201 and their monoblocks), Sim Audio, Bryston, and Mcintosh before making my decision on the Stratos Monoblocks. I use these monoblocks with a Classe 47.5 preamp, classe 1.5 cd player, and Michell tt. If I wouldn't have purchase the odyssey amps, I probably would have gone with the Classe monoblocks.