which subwofer is better?

If I heard them I would not ask such question,anyway thanks for respond

Its really hard to give you advice without knowing what type of speakers you have. I use the Fll0 because it could keep up with my electrostatic speakers. Good Luck.

Fronts r CRS-3(250 w RMS),center CRW-3C(250W RMS) and two backs CRM-2BIP(250W RMS),all Sunfires

I also believe all the above subs would work great with your system. I would also like to mention that the JLF112 is another sub you should consider. I personally like it better than the F113. Good Luck.

Never heard the REL. I'm a dealer for JL, and Velodyne. Both are outstanding. You can't go wrong with either of them.