autotek, crunch, hifonics, and mb quart are all made by maxxsonics electronics, I've heard nothing but good things about MB quart's new amps, if you go with MB quart i'd go with this one if you want to get the most out of those speakers mainly the 6.5's. Since you're gonna be running the amp at 4 ohms with the speaker configuration you have going on right now.http://www.sonicelectronix.com/item_25535_MB-Quart-REF4.80.html
Ya I saw that one too. Didn't know which would be best.