Bluetooth Audio Quality

[GhostITMG]

Is anyone aware of any comparisons done between the different WP models in regards to the quality of the Bluetooth audio. I've had an HD7 since launch day and I use it to stream music and podcasts to my car stereo. The podcasts all sound fine, but any of the mid to upper frequencies in my music sound staticy. I'm trying to understand if this is an HTC issue or a WP7 issue.