i was just offered two more systems 2 7515 and 8100d,then 4 mtx road thunder 15s 750wt ea from the late 90s like 1999 and a crunch 1500.1,first system was 375,2nd was 325
of the ones listed i'd go with the 8100d, that amp is worth about 275 by itself, and you can probly sell those mtx 7515's for at least a 100 if not more. 375 is a good deal on that. if you wanna get loud with a little that mtx amp will do the job.