I made a model of this
http://www.luft46.com/fw/fwbmw802.html using X-Plane aircraft maker utility, as best I could according to specs. I tried to err on the side of caution, giving it 200 less horsepower and a conservatively high coefficient of drag, and it STILL performs insane. Pushes up against the 400mph mark at sea-level, climbs at 4,500 fpm. Its got a high wingloading and snap-stalls bad though, although not as bad as the Fw-190.
I'd bribe HTC to model this thing and let me play with it in some sort of "what if?" arena.