Doozy of an amp question

I've herd the Mc but not the Sim. Your price point is some where around 17-22K  based on the retail of these amps?  

You have a Ref 10- arguably the best preamp ARC made on of the best every built by anyone. Your sound signature will come from that preamp and then your speakers. The power amp is 3rd on the totem pole. 

I'd give serious consideration to a pair of ARC Ref 250SE used. You can get them in great shape for 12K if you can manage a little negotiation. 

A Ref 160s for 12K would be a good option as well.

If your preamp was a lesser mortal other amps may be helpful but your preamp is the Formula 1 of automobiles so you need to performance match to it. ARC is designed to perform best with it's own family. 

The REF10 will pair very nicely with PASS Labs amps.  My mono blocs never make it out of Class A operation.  

Regards,

barts

Dali Epicon 8.

I understand the OP has an issue with fan noise on the big ARC amps. 

Without demos, buying is risky and resale value is always consideration.  That said, few folks buy HiFi gear looking forward a 'flip'.

Mac has a following, but it seems that Mac is a 'love it or not' brand, with little middle ground.  I would definitely demo this Mac...

I agree that ARC will be a synergistic, high SQ choice.  Perhaps you live close enough to a dealer to arrange a demo. 

I’m not a Mac fanboy, but if you are looking for a tube sound, check out PS Audio. Your ARC preamp will play well with their BHK 300’s or their new BHK 600’s. Both come with Gold Lion 6922’s in the input section and tube rolling is a snap.

All the best.