[shawn89]

I was having the same issues as you and tried all the options you did and more including nitrogen and a few others, the best solution I found was to use HTC Audio Manager, it reduced the lag by a lot but did not get ride of it all together but when using it with my samsung sbh-500 bluetooth stereo headset it gives me the best performance for music not skipping or pausing but still allows me to text message if need be without significant lag.