604x
Purchase this amp along with a 1001dx for $800. Though I haven't finished installing the sub amp, the 604x I just had to throw in and test out. More then enough power, while at the same time not at all lacking in sound quality. I see no future need to upgrade this piece. It's not the newer x604, this is one of the versions before Mitex took over. After adding an Audiobahn EQ I literally had goosebumps, an impressive piece.
604x
041b061a72