New build ideas

[focalrock4life 0]

ok, so I'm working on my front stage right now. However, I have a Z 15" V2 and a 2000D and was originally going to add a second amp and subwoofer and wall it off behind the rear seats in my scion.

BUT with the recent publicity/impressiveness (is that even a word?) of the SA series, I was thinking 4 12" SA series off of a 2500D (giving them each their rated rms) would be a better option. So, it would be a little less power but a ton more cone area. what say you? think it would be louder?