I am doing a custom install in a Ford Explorer Sport Trac. I am looking for a pair of 10's that are good quality and can fit within the following specs:

Dual 4 ohm Voice Coil (will be running @ 1 ohm)
400 to 550 watts RMS per sub
5" Maximum mounting depth
0.35 to 0.75 cu. ft. sealed enclosure per sub

I really don't want to spend more that $50 per sub but will consider anything reasonable.

Please let me know your recommendations.