[kennyt]

Tough to say, I just bought a Def Tech Mythos ST system, actually four of them and the Mythos 10 center and I am hedging on adding the Trinity to the system to just blow out the system.

All are good subs and it really comes down to what you want/need and more importantly what your room needs. I have no experience with the SVS, the Velodynes are OK, but I would go with JL Audio before them nowadays, I truly think JL Audio does a great job with their subs. All my bashing of car audio, I guess I was wrong because these guys really learned how to do bass! The Trinity is off the charts for price/performance and can shake your house off it's foundation if given the chance....

What are your goals?