Ive had experience with all 3 out there...and i didnt know that the sx has better sq than the HC had, i thought it lost some sq and gained some spl, but i could be wrong, as i am a lot...once again, HC, then jl, then eclipse. But if you just want it to sound real niec and not a lot of bass, then jl is 1st bc its the best sq sub out there IMO