Room size,,,what other speaker's are you running for mains, and AVR will help with a recommendation as well as the volume goals your looking for. You are only listing two different (sealed) subs and if your room is on the large side you may want to consider ported. I had the SB13 and i really liked it for music but found i wanted more for movies, also two SB2000's will give you better coverage if you have multiple seats. More info will help.
Integra DTR-6.8/ Integra DBS-30.3/ Klipsch RP160-M/ Klipsch R-IV RC52 Center/Klipsch SS1 X4 Surrounds/ JTR Cap-S-1's X2. Plasma TV.