High power integrated amps??

Dussun V8

All things considered, I would strongly advise you go for this $1200 option. OR ask Tyler what the quid pro quo is & purchase your own separate amp with electronic xover facility to drive 4x15".
Don;t worry too much about the "pro". And your room is large, very difficult to get coherent energy in so large a space. AND many women respond VERY positively to rhythm (which means midbass energy), so maybe a good thing?:)

I also have to keep the system clean

Whadya mean??

You should listen to the ASR Emitter.

I have heard the new NAD (M5 I think) integrated several times with various speakers and sources. It has 180 wpc/8 and the sound has always impressed.

I agree with Greg. For that kind of power, the 1200 dollar option is a no brainer. I'm sure that Ty has tested different power amps and is happy with the option he offers.

You won't find an integrated that can compete with that. Even Musical Fidelity won't get you there. There latest and greatest integrated has somewhere around 630 wpc. Why anyone needs more than 300-400 is beyond me.