diamond audio was my main choice. the 15s are cheap and sound good. i'm willing to spend upto $200 or so per sub. but no more then $250. i'll be getting $10,000 and i need to still get my tahoe. so after i get it, i'll have $3000 or so left over. i'll need to get the subs, amps, new alt, box, and wiring. not counting the 14 mids and 16 highs. so it'll be a bit costly but then i can just save up and get any other subs/speakers i may need.