If you want a pre-setup bandpass box for cheap look into this one..
http://www.crutchfield.com/S-fBovPdL...28V123BP&g=510
I've got them powered by a 600 watt (250 rms) Visonik amp and they're decent subs for the price. I've had mine in since July and I haven't had any problems (except for the amp acting up just today, I probably wouldn't recommend the amp that's in the $250 package, haha)
They hit hard-ish, but if you're buying new subs you maybe should upgrade.
But if you insist this is a good box of subs for the price from what I've found