BD,
I've got a ScoobySport backbox and downpipe. The noise is incredible, and it seems a shame to drown it out!!!
That said, I've got the following to do the the job:
Kenwood stealth MD head unit & CD changer
2 * 4-channel Alpine amps
6.5" component Kenwood Dual Mag speakers (fronts)
6.5" Pioneer speakers (rears)
1.5 Farad cap
2 * 10" Alpine subwoofers
Dynamat'd front doors and boot
It seems to work! Although there are times that the stereo needs to go off, and enjoy the ScoobySport chorus!!!
Andy
PS - Although I think that Saj, Lee and Adam have all done better jobs of their stereos than I have!!!