Hey guys, So i have my amp ordered (PowerBass 4k) from Audio savings and im stuck in a rut with what type of sub/subs i want to go with. Im either looking at 1 SMD 18 or 2 DC lvl 5 carnage 15's, or 1 DD 9918z? What would u go with for the type of amp i have on the way? I can always buy another amp for the future also. Please post your thoughts! thanks!