Your question doesn't really seem related to this thread but for a little insight for you I'll explain a bit. Search for BT Toggle if you want more info on it.
It sounds to me like you are using the builtin MS Stack. BT toggle won't get you stereo sound, it's just to redirect all audio to a headset and it'll probably sound like crap for music. If you get a stereo headset then you'd need to apply the Tornado A2DP hack which would allow you to get stereo sound with the MS BT stack. You could install the Widcomm BT stack and get much better stereo sound but there are still many little problems as this project is in developement and not even aimed at us 6700 users, it just happens to work because we're using the same chipset.
If you want compatability for now use the MS BT stack and get the Tornado A2DP hack and a stereo headset, there's a great thread here
http://pdaphonehome.com/forums/ppc-6...t=best+headset
that'll give you a good idea what headset to get and what problems you might experience.
If you want to try out the Widcomm stack, do it while your phone isn't full of programs and data incase you want to Hard Reset to get rid of it. BTW you can switch back and forth between stacks with a soft reset to get the best of both worlds. That's what I'm doing now, Widcomm for music and MS for everything else.