96civ

Ok right now I have a 12" Rl-P in a ported box (1.5ft^3 33Hz) runnin at approx. 700wRMS. Since I'm a little strapped for box size here, I'm thinkin about getting 2 12" subs and putting them in a sealed box. Now, what I wanna know is what sort of gains would I achieve from getting SSD's and put them in about 1.3ft^3 chamber for each sub?

I'm not really worried about SPL at all, just want something that'll impress the friends, sound good with almost any type of music, and not be TOO overdramatic. Thanks, I'm really likin this forum setup.