ive always used zapco and precision power amps . dollar for dollar precision power is hard to beat . ive prolly run 12 diff ppi amps and never had a single failure .
Precision Power PPI i640.5 iON 640W 5-Channel Class-D Amplifier
decent ppi amp there for what you need . as far as a loc goes if your want good sound out of any of them your going to have to use a signal processor .
http://www.crutchfield.com/p_975HELI...3372985&awdv=c
with this you will be able to plug in a laptop and tune your sound . these are amazing in newer cars where loc are a necessity .