Im looking to put a pair of sl-i10 in my dodge quad cab. The box will be fitting underneath the seat with dual .57 cu. ft. chambers. I need to know if this is enough airspace to run these, and also how much power to run to them. I am looking at either a KX 850.2, or maybe a KX1200.1 or something to that sort. Also, i shoud use polyfill in the box...right?