What kind of good, cheap amplifier would be good for one 10 inch subwoofer?

I am wanting to install a 10 inch sub into the back of my 2000 jeep wrangler, but don't know how to choose an amplifier for it. i am hoping either to buy a rockford fosgate sub, either the p2d410 (http://www.rockfordfosgate.com/products/product_details.asp?cat_id=4&series_id=31&family_id=10&item_id=120414&locale=en_US&p_status=) or even better, the p3d410 (http://www.rockfordfosgate.com/products/product_details.asp?cat_id=4&series_id=31&family_id=11&item_id=120420&locale=en_US&p_status=). Any suggestions on what kind of amplifier would be the best for the money,or at least how powerful it would need to be, and then also if anybody knows what kind of single 10in box would be good! Thanks