Bassworx for me. Their stuff is awesome. Changing out my old Blaupunkt system to a complete Bassworx system. It's gonna be LOUD Blaupunkt Key West MP36 (staying) Blaupunkt GT4 Special 750 Watt 4 Channel AB amp Blaupunkt PCw1000 x2 Blaupunkt THx 352 x2 Dash speakers Kicker Rear components in place of AC Delco 4x10s Nothing really special and pretty crappy SPL Changing to Bassworx 500.1D amp Bassworx 1200.3D x2 subs (i think) Bassworx pre-made ported box Nice system and should be good SPL