Old Autotek MM series where good amps, newer stuff is pretty well junk.
Crunch's GP series isn't bad, the rest is also pretty well junk.
Mixed reviews on MB Quart. The Discus I've heard some good about, some bad. The Onyx seems to do rated but haven't heard much else about them.
Power Acoustik is junk.
Soundstorm is junk.
If your on a REALLY tight budget, Audiopipe's AP series does rated for cheap.
If you have a little more to spend Crescendo has some nice stuff, really nice prices for the quality you get as well.
Also if you're looking for 1k-ish, look for a used AQ1200, should be able to find them cheap.