Thats a tough question, but in my opinion I'd go for 2 10's you'd have a tighter sound cause they don't have as much travel as a 12. If you got 2 10's hooked to a decent amp you'd still have plenty of trunk space and good sound. I used to have 2 10's in my little gmc s15 and it was actually too much at times you'd be deaf from moving so much air; it was fun!