Recommendation on Good decent priced SQ amp

I have always been a SPL guy, but i have been through about half a dozen component sets. I've had Crossfire BMF components, Rockford 3 way components, MB Quart Reference components, on these i have ran amps like Memphis PR200, Eclipse 960w 4ch, Concept 2ch. So far i know the Concept kinda failed on me on very hot days, amp would shut off easily due to the naturaly Ambient temp added to the circuity temp. The memphis did well, the eclipse, not so much.
So i'm looking for a good SQ orientated amp, i don't wanna go expensive like a Brax or anything high dollar, but i do want some clean circuitry. I just picked up a set of MB Quart QM160's for like an unbelievable $25 and they are in great shape (real Quart from Germany) not the RF stuff. So i'm about to find an amp, one of my SQ friends uses Zapco but i don't need anything that expensive either, just looking to spend up to $300 ish 4ch. I'm not familiar with the newer stuff 06 and newer, all the audio i'm familiar with is 1995-2005 or so. Thanks in advance

I think you'd be better sticking with the old school stuff ... but then again, thats just me ...

Sorry I didn't see what you were looking to spend. I agree, with that budget look for old school amps. They sound as good or even better than many new amps, and it's cool to have a piece of car audio history in your ride. I have an old soundstream MC245 in my car right now.

There are some nice ones on egay right now. search "old school amp"