Got my new Tantrum 1200.1, now need to decide on s

OK, I really don't know what I want to do. I was thinkin 1 brahma 12, but then I thought, hell, for that price, I could get 3 Type R 12's. Or 9 Pioneer 12's. I really don't know. I don't have a vehicle to put it in yet, so i don't need to get anything right now, but I want to start getting an idea of what I want. I mihgt either be getting an older Ranger extra-cab, or an older Cherokee, don't know yet. I need some suggestions on what I could use for subs. What would be my best bet for taking up the least amount of space, just in case I do get the truck? How loud would a brahma 12 be compared to 2 alpine 12's, or even 3? Would the Alpines be that much louder? I'm an all-SQ guy, also, so I'm gonna def go sealed box, and I do understand that in order to get loud bass from a sealed box, the only alternatives are better subs, or more subs. I'm willing to give up the space if it wil be worth the money, and of course, the extra space lost, to go with multiple woofers.

BTW, the max price i will spend is what I can buy 1 B12 for, which I believe is $379+ shipping/. Thnanks, guys.