one option for amps that will give you the same quality you're enjoying now but at a much more interesting price (than audiophile amps) might be pro-amps from Crown Audio or QSC or others.

to get an idea about that, pls see "My HT room" in my sig.

total power in my system is about 8000 Watts (same as my winter baseboard heaters' total).
it means it just loafs along and is ready to reproduce the highest instantaneous peaks without a hint of distortion.

pro-amps usually don't need flat fr.resp. below about 32 Hz, so some of them filter it off. if you need an amp to reproduce those, check closely on the specs before you buy.

in closing, my qsc amps carry a 6 year warranty. :-)

hope this helps.