BF109
I'd love to see a 120 size Messerschmitt 109. Two Piece wing, 120-180 size, as I see it, in scale modeling this could very well be 80" or over, I mean, I'm not looking for 3D power to weight in a scale airplane. The 109 that won Top Gun last year I believe was only powered by a Moki 180. Perhaps a FW190 as well. All retract ready.
On the allied side of things, I'd have to agree, a Hellcat would be one bad*** bird, set up for air rotating retracts for reliabilty's sake. I'm not sure the readily available mechanical rotating retracts are up to the task of a 15lb warbird, but I could be wrong.