Dream system, well, there would have to be two of them. One for SQ, and one for SPL.
SQ: Ranbow Components, Clarion DVD screen/ H/U. Clarion 32 band EQ, All McIntosh amps, Focal Utopia Subs 2 12", sealed. PS2, or X-Box, no wait, both. Image Dynamics 8 inch sub mounted under the H/U. Custom laser aligned kicks, and tweets on the dash, components in doors, ect, ect. And i would have those real diamond tweets that i remember someone talking about.
SPL: 36 MTX RFL's in a custom "ryder" truck so that the cabin was attatched to the box. 3" walls on the truck, used as a box, ported, if room, sealed if not. w/ 108 PPI-PCX 2400 (1600 watts per amp). 108 Optima Deep Cycle Batteries, all controlled w/ a Jensen H/U. (just kidding). I mean a Pioneer/Clarion H/U. I bet that would be kinda, sorta loud...
The whole cabin of the truck would be made out of 3'' thick steel, and the windows would be 6" thick lexan.
To move this bad boy around, i would have a Cat "tractor trailer" engine put into it, along with at 24 speed road ranger ****** (i can't remember how many speeds there are). Just so i can drive down the road, and break other peoples windows.
but i don't know if you could fit 108 PPI amps, and 108 batts. in the back.. along with the box for the subs.