I've rocked the CVR's and several JL's.
I actually think both are great.
You may pay more for the JL name, but remember this... JL subs have been in more competition winning systems than any other sub!
They've been earning that name for years and years.
If you don't care what other people think and want to save some money, though, you might want to check out Powerbass.
I've been beating the shit out of 2 Powerbass 12's with about 1800 watts for almost 2 years, now.
My system is always pumping LOUD and I've never had a problem and always get attention.
Just a suggestion.