IM new to this and i love it, lots of info guys! Anyways i drive a 2001 silver zx3 of course a 5spd. I wanted to know which u recommend the Thermal R&D or Vibrant, i heard both sound clips, both sweet.Is there a much of a difference in loudness, i know Vibrants the loudest but how much louder then the thermal, which would be cooler for some 18in enkei cdr9's??Thanks