I can't say much about the 12's but I just build an enclosure for my sisters altima and threw an SD-2 10 in there run by a punch 300.1 and it sounds great. Tuned to 30hz and it can pound the lows like crazy. Definitely could take some more power though.
I know its a bit late but I have 2 sd2 10's in a 2cu.ft ported enclosure around 32hz on a Hifonics BRZ 1700.1 and they sound great hit hard. I am thinking of going with 4