I like all three options and I own none of these...
PAP M92, if it is anything like it's big brother, is good Yugo quality, thick receiver, well made weapon..
Romy Mini Draco gives you the 7.5" barrel instead of the 10.25" of the other two, but is a lesser quality perhaps than the Yugo or C39...?
C39, milled, and already has a rail on the foregrip.
All at J&G for under $500....
Why would you suggest one over the other.....?