Cheers guys, just polished my A-Bar with "Peek" polish and they've come up lovely

Just got to wire in a head unit (only a permanent live and a negative currently coming through the dash :S) and put some speakers in it! Anyone got any bright ideas about where to put a sub for a bit of a kick?
Would ideally like to keep my boot space so am going to check out if an 8 or 10" would fit in the rear foot well with the seats folded up...