Try some of the newer Perreaux amps. I know this may get tiring as I keep recommending them to anyone who asks, but Perreaux's newer lines are very impressive. Great sound, great build quality. A whole lot of power, and high damping factor which keeps the speakers under control at all times. No muddiness whatsoever with the newer Perreaux amps.
If you want an integrated, and would be interested in trying a Perreaux, I'd recommend checking out either the 200iP integrated or the Radiance R200i integrated. If you need more power than 200wpc check out the 350p power amp.
If you want to try something else, that won't cost you an arm and a leg I'd recommend a used Ayre V5x which will give you a different sonic perspective, and should have enough power to drive your speakers. Check Plinius amps too, pretty good stuff, all depends on your sonic preferences.
I'm not particularly a fan or Musical Fidelity amps, but that doesn't mean anything as everyone has different priorities. Just that in my opinion they sound kind of soft, and polite...then again that is just my opinion.