I think a station C-12 would be very useful for a twilight tour. Good flying, multi-engine turbine time, and a very useful type rating out of it. You can also fairly easily get your ATP out of a checkride if you don't already have it. Lots of places hiring right now are flying the King Airs and already being type rated and having a 1,000 hours or so of time isn't a bad thing.
Of course knocking out 400+ hours per year as a T-34C IP might help with the overall hours that would be accepted at the airlines, but then again you aren't building any multi-time that may be accepted.
If you got really lucky, you might find yourself in a UC-35 and get another valuable type rating.


USMCFLYR