i use sonyericsson MW600,which is the Best Bluetooth Headset if u r a music junky,it has nice screen for detail power status,mo.number,pairing etc(does not show name instead number in N900),built in FM,awesome eairphone,multipoint(i use my computer,my sony HiFi and N900 with this),plus all buttons u need,long Battery life then it's rival and it accept N900 charger.i like default headset which comes with N900 but it's cords design is weak n within months i lost oneside of sound then it's basicaly useless for music,hope nokia will makes more strong joints in thier headset just like Shure Headset.

Note, when u reboot or turn on ur n900 it autometical connect but act as a remote only first,u just have to edit,disconnect then connect in bluetooth setting(status bar)
Buy Original (saw lots of copy)