Ok im getting money for Christmas and I'm getting a system but I don't know what subs to get I've been looking at the FI BTL12, Audiopulse Revo 10, Audioque HDC3 10 and Lanzar 1233d. I want to know what y'all think is the best. If you know of some that's better for the money tell me. Im gonna have $800 to spend on 2 subs.And i can only fit 7.5in. mounting depth or smaller.I can have about 3cubic ft.