get the pioneer. dual sucks, they should stay making marine radios.I HAVE HAD NOTHING BUT BAD LUCK BUYING ANYTHING FROM BEST BUY!!! go to
www.hookedontronics.com , they always have real cheap prices, and good equipment.
find a headunit that has a minimal of 52x4, and if you are going to put a full system, find one with 3+ sets of preouts@4+ volts. Good Luck!!!