I go the HTC Stereo Clip today and like everyone said, it sounds like you're using an AUX cable. Sounds amazingly crisp and clear with no static, popping, or hissing noise whatsoever.
My car has built-in bluetooth as well and I have my EVOLTE set to use my car's bluetooth for "phone audio" and the HTC Stereo Clip for "media audio". Works great!
BTW, a little off topic, but I love the new voice of the GPS lady in Google's Navigation app. She sounds more human/natural sounding than the robotic sounding lady I had in my OG EVO.