Word of warning: Bluetooth is not the seemless/trasparent link it is supposed to be. I'm a long-time user of bluetooth gear - headsets, GPS receivers, PDAs, printers etc etc.
In the early days, it was only Nokia that tended to nobble they gear so it would only work with their own gear, but now a lot of the newer phones with updated B/T versions (1.2) are not as backward-compatible as they NEED to be:
HUH? well I was well impressed with my HCB-300 car kit when it was installed about 10 months ago, worked a treat with my T610 and moto V600. Replaced the moto with a SE K700, and after the first few weeks, bluetooth connection with the kit just dropped all the time. Now replaced the T610 with a T630 (works like a dream, NEVER any hassle), and replaced the K700 with a K750.
K750 is a fantastic phone, BUT, bluetooth is a big pile of steaming /ubbthreads/images/graemlins/swear.gif! it pairs with the car kit fine, connects to it sometimes, and when it does connect to it, you get the first 8~10 seconds of audio into the call, then the audi drops out - b/t connection still OK, and phoneline still active.
Sorry, i'm ranting aren't I !!
I'll get me coat.....