1 12" or 2 10"?
 

I have a pair of 10" Ultra Linear ULX10D's (don't laugh, they aren't as bad as you might think), and a 12" MTX 8500.
I'm debating on which one to go with.
My only fear is destroying the 8500 since my amp will more than double it's power...

I also have a 12" Cerwin Vega 124D, but I'm thinking the 8500 would be a better choice. I can't even remember the specs or how that Vega sounded, so I decided not to bother with it. I might use it for a home theatre sub project yet, who knows.

Use the MTX woofer.