In the door I dont think it can be 100% sealed unless you are making a new door panel. It will be more like a IB setup unless your really getting into it.
Best is to audition each, but thats not always practicle. As for response, just make sure the driver can play above its crossover range so that you can have some overlap if you need to tweak things.
95 Contour SE '01 3L 
