Buy a trailer and install it all back there to save weight
Seriously, if you're more into the SQ portion, find an old Rockford Power series amp and a Kicker CVR12. It would be so cool to go with old school gear in your car.
I run a newer RF Punch on my CVR 12 in a Kicker Prefab box and it's THE best sub I've ever owned, especially for the price. My Solo Barics are also up there but for the price I'd never switch subs again.
I hit 134 ish daily with only around 400WRMS going to that sub and it's so friggin dynamic its unreal.
I'd actually compare it to an IDQ which is also a really rockin sub. But dynamiclly, it's almost comparable to a Focal Polyglass V2 which is saying alot.
Anyway, I'd stay away from huge weight like the 4 10's and find something that matches your front end nicely. Make it an all out SQ car Rick, Focal BE's and Brax Graphics for each speaker.