I bought the ProClip base as the Touch Pro was too heavy for my vents. It's the thing hovering over the AC Vent.
Then I bought the Universal Swivel Clip contraption from Sprint. It comes with a sticker holster that I stuck right in the middle of the pro clip thing. It's not bulky like the rest of them and I can still rotate it and plug whatever I want into it. Hell, the touch pro practically covers the pro clip up. I also use the belt clip so when I hop into the car I just unclip it from my belt then drop it into the car's holster. Very snazzy...
Overheating is never an issue considering I've got the AC blowing right on the back of the thing. The only draw back I've seen is it's awkward to plug the phone in while it's landscape. It weights it down just a little on the right.