I'm going sealed, and I have a MBQ QAA 1000 for the sub(s). Here is what I'm looking at:
12" IDMax (x1)
10" IDQ v.3 (x2)
JBL W15 GTi MKII (x1)
RL-p 15" (x1)
MBQ PWE 352 (x1)... only to match the rest of my stuff
I came from an Audiomobile MASS 12", sealed w/ 500W and I was pretty content...