LG VX-8100

I recently ordered the Moto H500 bluetooth headset on Ebay and turns out the seller is closing his store, so it looks like I have to look elsewhere. But I am looking into the bluetooth car kits that are out there. I was checking out the Moto HF850 but it looks like it requires some installation and I don't know how complicated that will be. Has anyone tried that one and how hard is it to install? Or any other recommendations? Or should I just stick with the headset?

Thanks!