What subwoofer(s) would besy fit my need?

my vehicle will have plenty of room for subwoofers (the smaller first bronco) i have a spending limit up to 600-700$$ but i need everything you need to make it work and make it work right. i would love to get some nice loud pounding sub(s) with good quality. and i will use them for "bumping", not background b for rock music... dont answer if your gonna say all the major brands i already know them. I WILL BUY USED! (craigslist- No ebay)