Hi Kevin. My set up is very similar to yours, I sit about 10 feet away from my M60s. I currently use a Denon AVR-1804 and while it sounds fine with these speakers, if I were buying again I would have spent a little more on a receiver. My Denon does not have the ability to add an additional amp. I would go the Denon 2807 route if I were in your shoes. Sorry, but I don't have any info about ecost.