I'm getting comps for the front, either Polk MOMO's or diamond Hex's at this point. What, if anything, should I get for the rear deck. I have a Stratus, and will have subs in the trunk. Some say I should leave it empty, others say to add midbass speakers, others say coax... Any help is appreciated. Also, I know this is a Polk forum, but can you tell me why I should get Polk MOMO's over Diamond Hex's (6.5 in comps). I am about sound quality, really clean and accurate.