im happy with my HU and door speakers but my sounddesign amp and pioneer 8" shallow sub sound like crap at higher volume levels. i want something much better that will still allow me to listen to the music at relatively high levels without distortion. i think i want a jl audio 10W3v3 subwoofer but i would like to know what amp i should get with that. my current amp/sub will go into my wifes new car when i install her pioneer avic unit. thanks