i think the rockfords will be louder but i know the jl will have a lot better sound quality, i just dont want to upgrade to the way more expensive sub and loose all the punch of my 2 rockfords

here are some links to the speakers to compare specs

JL's
http://www.crutchfield.com/s_13610W73/JL-Audio-10W7-3.html?search=jl+w7+10

rockford fosgate's
http://www.crutchfield.com/p_575RFP4212/Rockford-Fosgate-HE2-RFP4212.html?tp=111&tab=features_and_specs