Windows Mobile 6 Compatible Headunit?

Heya guys, haven't posted on CB for a looong time, tut-tut i know but I really need some advice

So here's the story, my girlfriend accidentally trashed my ageing head unit a few days ago and I'm now on the lookout for a new one, so since I've now got an excuse I want to get one I actually like, so its not all bad.

But here's the problem, I've been really struggling to find information on bluetooth compatible headunits anywhere. I own a much loved O2 XDA Orbit smartphone running Windows Mobile 6 OS and woudn't mind a bluetooth head unit I can pair up with it, trouble is I cant find a single one that I know will work because I've read that they work differently to standard bluetooth devices?

Now I know that even if anybody could recommend one I haven't got a massive budget, but if anyone knows a website with some information they could direct me to or has any advice/experience with this i'd be very grateful!

Thanks for any help, Matt