I see two dashboard mounts:
A suction cup - iOttie One-Touch Windshield Dashboard Car Mount Holder for iPhone 5 4S 4 ..." from Amazon, for $25 with shipping.
and a Proclip mount over the hot air vents, in two pieces for ~$100, which both fixes the cables in place and doesn't block the windshield
Anyone know what's best? I'll probably just get both, and relegate the loser to my other car, if it's the suction cup one.