the comp only yields 150 watts rms. and the new comp vt yields 400 watts rms. which is far from your goals of 800 watts.

do as boogers suggests and find out the total displacement of the tube and then research some subs that have the power ratings and displacement that you desire. if you cant find any info from bazooka for displacement, then go to a local staples/office depot and buy a small pack of packing peanuts. Fill the tube up to the top and then pour those peanuts into a measuring cup to find displacement.

also, once you think you have found the perfect matching sub...always go to a shop to listen to it before you buy. everyones opinions on what sounds good differs. and remember that a sub in a showroom floor will sound alittle different then in the trunk of your vehicle.