On the free-lanced subject, I've always want to see a Dash 9-60C (C60-9), or an AC6000C (hence a standard cab, not wide), or an SD90AC/SD80AC (spartan cabbed...). Heck a an AC4400B would be nifty...
I want some M-K safety cabs though, I want a fleet of MK5000C's, say, a dozen? I'd love to...