Which sub is better - JL Audio or Definitive Tech?

I'm looking for a new sub. I've narrowed my search down to the JL Audio Fathom F113 and the Definitive Technology SuperCube® Trinity Signature. Unfortunately there are no dealers for these brands anywhere near where I live. So, I'd like to hear what others have to say.

The room where it would be used is 3000+ square feet
For music the JL F113 without any doubt - passive radiators are best avoided if you want good transient response.

I use a no compromises sealed high end pro studio subwoofer but I have to admit that the JL F113 looks like a great bargain even to me - I could have bought three Fathoms for the cost of my sub!