Alright, well I'm not a stereo wiz so I'm out of suggestions. Have you tried going to a local stereo shop and asking them for suggestions? Most places give advice out for free. :)

im running a C-west voltage stabalizer on my canadian tire battary with 2 12s 800 wats a peice with 3 amps (2 500s and 1 250 for components) and NO CAP !!! my lights dont dim or flicker at all try that instrad of ****in with ground wires and sandin ground points caacitors r bullshit !!! try a volt stabalizer man mine came from ebay n cost me $30 to my door