Thank you..I will try to answer your questions....1.) I want the sub to have great SQ, but also punch you in your chest (or have the capability to do so), play very clean, not distort, and play low notes very well. 2.) I have 500 watts rms for the sub...(the amp says 700 watts rms, but I think they overrated it) It is also being bridge to get that amount....I know I have done this backwards, but I already have the box, and it is sealed .65 cu. ft.....VereChronicus - I am not sure what all that means that you said, but I also found some specs on two of the subs that I do not know what they mean, but they vary significantly...They are - Boston Acoustics G5 10" DVC = VAS 29.77, FS 32.37, QTS 0.47, XMAX 15mm....and the Alpine Type X DVC = VAS 17, FS 29, QTS 0.63, XMAX 19.1mm....I have no idea what those mean, so if you could explain them in simple terms, and how they describe the subs, I would greatly appreciate it...The wiring is going to be another problem, but I guess we will get to that once we decide which sub will work...Thank you guys.