Hmm, you have a P22 already, which covers a good chunk of the SSH territory (both being CU22-based), but the P22 is not Semi-Hollow, which does add a nice bit of flavor. Is your P22 equipped with a trem or stoptail? If a trem, then maybe too much similarity with SSH. So I would suggest the 509, because that is a very different beast. Esp if you can find it in a WL config like Bodia's (or mine): maple neck + FB, swamp ash body, or other non-std woods.
The Silver Sky is about as far as you can get from anything in your arsenal or on that list, though. It would be a very different world from the P22 or SC HBII.
So...I suggest Silver Sky.