Okay, my brother is thinking about getting Integra Research's RDC7 and RDA7 amp and preamp combo. I know these products are generally regarded as exceptional high end pieces, with the amp designed by Balanced Audio Technology. My question is this. Does anyone here own these two pieces or have any experience with them. He has M&K speakers. His setup includes the M&K S-250 speakers at all 7 locations, plus a pair of MX-350MKII subs. Can anyone give me some thoughts? He's trying to outdo me, but he won't succeed.