@macg19 I couldn't agree more. I have a Cary SLI80 HS paired with Volti Razz and I am over the moon with the set up. In my opinion I'd need to go the route of pre-amp and monoblocks to significantly improve where I am now. There's just good musical synergy with my current set up.
I'd normally highly recommend the Cary most of the time. However I feel the Cary SLI 80 would not be a good match with the Harbeth's. Perhaps the Cary SLI100, on sale now at Cary Direct starting at $3897.00. More if you fully option the unit, which I did, and do not regret in the least.