I just put an amp under the drivers seat and processor under the passenger seat, replaced front speakers with Hertz hi-energy (tweeters replaced the ones on top of the dash beautifully, looks like it was made that way) and in the rollbar with Hertz hi-energy coaxials. Sound is crystal clear, not at all distorted as loud as I can play it. I can't actually turn it up all the way because it'd be too loud. Hard to believe there's no sub in the system...bass is fantastic!
Oh...wanted to keep the mygig, that's why I did it this way.