Audio Research Corporation ARC Reference 600

For the vintage, Ref 300 is superior in sound quality to Ref 600. Google for reviews and probably why Ref 300 are more $$ than Ref 600 in used market.

I am thinking about VTL MB 450 amps as well. It seems like ARC has more fans then VTL. Is there anyone who would choose VTL MB 450's over the ARC 300's?

Those speakers are so efficient that most often they're using only "fractions" of a single watt! You seem very enamored with the idea of ultra power amplifiers (hot rod effect).I say in that case satisfy your craving and go for it. It's a strange match but if it makes you happy, why not?

what are you after? if it is sound quality, using huge high powered amplifiers from ANY company will be a step BACK in sound quality. If you were using huge and inefficient speakers that would take advantage of all of that extra power, that would be a different story. But with your speakers, high powered amps would sound less good than one with less tubes and circuitry in the signal path. A ref 75 would sound MUCH better than even a ref 150, or any of their higher powered monoblocks.

You guys are awesome. I am gathering that a ref stereo 75 is better than monos? Or are you referring to two stereo 75's as mono blocks?