The only payware I have is GA aircraft, but any of the planes by Carenado are great, I dont have the Mentor though, but everyone says it is a good one ;D
I have the FSD Piper Seneca V, it is a great aircraft, and I have the Dreamfleet/Flight 1 Cessna 310, and Piper Archer both of which I like very much, although the 310 seems a bit hard to land....

I also have the Eaglesoft Beechjet 400A/Premier 1 package. I like both of those except for the fact that the panels are kinda hard to read, the Beechjet panel is a bit better than the Premier 1 though.
Anyway those are what I have, and my feeling on them, so good luck with whatever you choose ;D