The SB-2000 PRO is a sealed sub, where as the Dali sub is a ported. Since it is not a large ported sub, it probably doesn't have a very deep tuning frequency, but it should still have greater deep bass output than the SB-2000 PRO. The PB-1000 will probably dig deeper but not get as loud. I think any of these subs would suffice for you, but I think you should get two subs instead of one.