hello Mr. ferret: as you may know, Roger voiced the RM 10 with Quad 57 esl speakers.Quads unlimited rebuilt 57s are about $4000. I believe the combination of this amp and these speakers are hard to match at any price. In the deal, you would accept minimal bass below 40 Hz and not being able to play above about 100 dB, which you shouldn't do anyhow if you don't want to go deaf. Audiophile sites have loads of information about the speakers. Try quadesl.org, among others. What do you think? Best regards, Tom