I'd go with Parasound JC1+ mono. I'm in the camp that many of the 40K-70k power amps don't provide the level of benefit commensurate to their price. I run Classe Delta Mono's with my Alexx V's with great result. The spec's on this amp along with the Parasound don't get much better. I think you might "hear" differences between these amps and their higher priced brethren but not necessarily "better" just different.