i was wondering if jbl subs are really great quality that i have heard they are? I am trying to decide to get jl audio subs or jbl subs. I have never heard jbl subs before, but i am thinking bout getting one JBL 10" P1020 subwoofer. 400 rms and 1600 peak watts! I am not too happy with my polk audio's. I was wondering which jbl amp i should go with?