go for the higher powered one...for two 18" XXX's, you need the power //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
also going to need a pretty hefty electrical system to back that up, hope you've budgeted for that //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif