I have tried with a dogtag controller (X2 N88) and a standard headset (not the bundled Nokia one), and everything works as it should
- by default the audio goes to BT headset
- when plugging in wired headset, sound goes there, no sound from BT headset
- when unplugging, back to BT

The buttons work fine at all time, except as mentioned the "pause" one. However it works after the first time I pause/unpause, it only bugs on the first try

Anyway that's great, could not get it to work this way with my phone old. But when will we be able to choose which profile to pair (ie. only AVRCP not AD2P)? I never want sound from the headset (there is any plugged in). Or is this not possible with BT?