Rich,
Don't think the Ref 75 can be used as a mono blocks.
Given the high sensitivity of your speakers, the Ref 75 should have more than enough muscle. I only mention the Ref 150 if you think you may change out your speakers for less efficient jobs. Otherwise, the Ref 75 is at the top of the audiophile food chain.
Good luck and let us know what you decide upon.
Cheers,
Bruce
Don't think the Ref 75 can be used as a mono blocks.
Given the high sensitivity of your speakers, the Ref 75 should have more than enough muscle. I only mention the Ref 150 if you think you may change out your speakers for less efficient jobs. Otherwise, the Ref 75 is at the top of the audiophile food chain.
Good luck and let us know what you decide upon.
Cheers,
Bruce