Best amplifier and preamp for klipsch heresy 3

I am searching for the best solid state amplifier for klipsch heresy 3 and an oppo bdp83 blu ray player.My room is a 12x10 with hardwood floors.I AM CURRENTLY USING AN NAD C370 INTEGRATED AMP AT 120 watts per channel.does anyone know if the 375bee is an improvement over the 370,also looking at Pass,B&K,Aragon,Odyssey Stratos,Mcintosh,Krell,Bryston,and parasound.Would greatly appreciate any suggestions on these or any other amplifiers that matches good with these speakers.