First Watt vs McIntosh vs Ampzilla


I'm searching for a power amplifier to pair with a McIntosh c712 preamp and Zu Omen Def speakers. 
I want it to be melodic and clear (not mellow and round) and with a good soundstage, capable of filling my big living room (12m x 6m) with powerful party levels sound - not necessarily ear splitting levels.  
Nearby I can purchase a First Watt M2, a McIntosh MC7150 or an Ampzilla 2000 (stereo) for a good price. 
I cant audition them at home with my system, so besides my personal opinion on the sound at the different shops, what do you have to say regarding these three models? Any of them is better than the others? Better sound? Better reliability? 
Any opinions?

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Showing 1 response by roncagg

I recommend an F7, those 20w go a long way, and it will be more resolving/less rounded sounding than the M2 (which I have been told is more like the aleph 30 I had than the F7). I run it into DeVore speakers, not as efficient as your Zus and I never have an issue with volume in my large room.