I'm wanting to put a Bluetooth speakerphone set up of some sort in my car, but don't want one that goes through my radio speakers (I generally am using my aux in for my MP3 player or Sirius receiver, I'd never remember to switch it to FM). I don't have business calls or anything, mostly calls to family while I'm driving, and since so many states and areas are starting to crack down (or at least consider it) on driving with a cell phone in your hand, I may as well go ahead and take the plunge. Problem is, I'm so confused by all the options and terminology. What's the difference between a "speakerphone" and a "car kit"? Is one installed (hardwired) but the other isn't? Recharging in the car isn't a problem, I have 2 outlets in the front of the truck I can use at once, so rotating between the devices on a long road trip won't be a problem, if needed. I'm of course on a budget, so something around or under $50 would be best. Anyone got any ideas / recommendations?