i have the mmf-7 and the Musical Fidelity and my speakers are Signums from Sonus Faber.
The only thing that i`ll tell you is that i`ve tried to upgrade my Amplifier for the last six months, i check Audiogon everyday, i go to the forums and then i listen to wahtever amplifier with good recomendations and so far i haven`t found a better sound-deal that my a-300. i`ve listened to carys, cjs, krells, vtls, rogues and i think they are all very, very good, then i come home and i forget the whole upgrade thing because i realize once again how good this combination is. Seriously, i`ve got the money and the will to get "better" stuff, but i can`t go against my ears and hart. mmf-7, rel stratta-3, Musical Fidelity a-300, sony xa777es.