try google im not gonna research them all
most are avalible at ssaudio.com/store
dd you will either need to call directly or find a dealer u generally get a better price straight from dealers as dd doesnt budge from msrp so they dont undercut their own dealers.
you are looking at 350 and up for that kinda power handling i liked my z12s alot and they took power fine, the dd's have a distinct almost hollow sound but i like them
also look into fi caraudio like the sp4, n2, n3 and the bl