Anybody prefer JL Audio or Velodyne subs for rock?

Hi audiophiles, I'm looking to add a sub to my 2-channel audio system, and I wanna rock! My components are McIntosh MC252/C46, etc..., speakers are Klipsch La Scala II so high DB output sub is preferred. Has anybody heard both the JL Audio F113 and Velodyne DD18 and care to comment? I'm also considering a JL F212 but the beast weighs in over 220 lbs, and the price tag is heavy too. FYI- Velodyne has a special offer: good thru the end of April you can get a new DD18 for $3K, this offer should be good at most or all Velo dealers.