My problem is that I don't think the 6003 amp will have the grunt for the RX6's. Since the the 7003 amp is only £200 more, I'm tempted to go with that ? Any thoughts ? I know many of you will advise using a NAD amp (355 springs to mind) but I've already bought the CDP and speakers and I always stick to the same manufacturer for CDP and amp. So Marrantz it is. Cheers for any input, guys. Gary.