First, I want to reiterate that I love your Accu-sim products.
Further, I agree that with the release of the Spit (Mk and II) and P-40 (P-40B, P-40C, AVG, RAF and Russian), you are now moving into a multi-model approach on releases (perhaps my use of the word "variant" was imprecise...you are right-- "variant" indicates "variations of the same model", and your B-17G, B-377 and Cub certainly do all reflect being "variations of the same model").
That said however, what I meant is that your satisfied customers would appreciate truly different models of some of the earlier releases: B-17F, P-47D bubble top, etc. There would be many more repaints that could be done, and many different operations that could be simulated, as they are models that were major players (B-17F), or actually the more numerous of the type (P-47D bubble top with 7,179 units, vs. 5,423 Razorback). I can't speak for others, but I would gladly pay additionally for these models.
Being realistic though, I realize it unfortunately isn't probably going to happen for The B-17 and P-47D at this stage of the game. As a result, I encourage A2A to boldly continue on the path they have started with the last two Accu-sim airplanes by releasing multiple models with each new product (especially the F-104, and F-4). There is no doubt that on your current course, you have (and are continuing to) redefine FSX...