2 10's or 1 10/12?
#4
All other things being equal..same sub, same car, proper box, etc...two subs with half the power will outperform a single sub with twice the power. In your case though, it's two 10" vs. A 12" with double the power. In this case, the single 12" will yield about the same output, have a much smaller box, and will be less expensive. I'd go that route.
#7
alright i think i might go for the 12 se then, the sub is rated at 600rms, my amp does 500rms at 2ohms, do you think that it would be fine to power the se? or do i have to look for another amp also?