I have the RealAir Turbine Duke too, and it's a joyful airplane. The modeling is wonderful and it's an absolute rocket. It's not as difficult to stay ahead of as I expected, with the exception of learning to manage your power early due to the sluggish response of a turbine compared to a piston. It also doesn't have the persistence features that A2A provides, but it does have a cold and dark option and in-game checklists (via FSX's Kneeboard in the menus).
The only reason I haven't flown the Duke on PE is...the faster I'm moving, the faster I have to make radio calls and freq switches. I'm not ready for that yet.
