Hi I have a Pioneer lx59 receiver and I would like to improve stereo playback quality. Would adding a better power amp via the pre-outs improve the sound quality or would the receiver preamp degrade the sound? The problem I have is the mcacc on the receiver does a great job at bass management and I fear that if I use a standalone integrated amp I would end up with crazy booming bass due to standing waves. Could anyone advise on the best approach? I'm looking at spending a 1000 on an amp. I have monitor audio silver 200' in a 7.2 setup with velodyne cht 15 and velodyne spl series 11subs.