I'd say go with the B200. If you get a new one, make sure you get the Pro Line 21 setup - that is very nice and it will make your job easier. PC12 is a great airplane, but the longer trips will truly be much longer for you and the passengers. Both would be fine for short hops to SOCAL but the King Air should instill more confidence in the passengers - it's bigger and more impressive. If money ain't an issue, why not get a light jet like a Premier or a Mustang for quick hops (assuming no more than 4 pax). Too bad that Adams 700 Jet isn't out yet - that would be a great airplane for short hops to SOCAL.

Let us know what you decide to do. Good luck.