Thanks for responding, I appreciate all feedback as I try to nail down an amplifier.
I have a miniDSP and am not thrilled with its performance, it does not always seem to function when repowering on my system. I really do not like the unit at all. The speakerpower amps do seem nice, but the non-plate versions are very expensive.
I know LG has a great rep with the FP series which has incredibly high power output. This unit appears to be stable to 2 ohms per the spec sheet, but we all know that spec sheets can be BS (although some brands are more reliable than others, I assume LG is very reliable).
To many options, the Crest CC 4000 measured very well by a member on one of the pro sound forums, used with a good DSP unit should be good. I cannot find info on the ULF filter frequency for the CC series, sine damping factor is listed from 10 Hz - ? I assume it will go down to 10 Hz. Yes, I could buy a Behringer but I don't like the looks, would really look bad in my equipment rack which is not hidden in a closet. Perhaps its vanity, but much of audio is about perceptions.
Current Gear: PJ – BenQ PE7700; Receiver - Onkyo TX-SR805; Blu Ray - OppoBDP 103; Turntable - Dual CS-515 w/ Ortofon Super OM10; Amplifiers - OdysseyKhartago, Adcom GFA555, QSC RMX 1850HD; PEQ - Behringer FBD2496 [Near FieldSub], miniDSP 2×4 [Flanking Subs], REW; Speakers - 4 Pi (w/B&C DE250/JBL2226H) × 3 [LCR], Yamaha Crap × 2 [surrounds], Exodus Audio Maelstrom-X18" sealed sub [near field sub], LAB-12 based ported sub tuned to 22 Hz x2 [flanking subs, XO set at 40 Hz]