truck sub and amp?

first suggestion. the fosgate t6004. its got a great 24db crossover and the specs would fit the subs you say you have/getting. they make a great coaxial in a line they call the power series. coaxials are easier to set up/install and you dont have tuning issues with the speakers fighting over getting the wave to you. you can make a set of seperates sound awefull if you dont have the experience, time, and testing equipment for a proper install. if you decide on seperates then make sure that the tweet is no more than the diameter of the cone away from the midwoofer. ther is my first suggestion for ya. should be in budget i think also.The RIGHT way is the ONLY way.