I would pay for a 3D model, and already did with the 3GO conversion for DCSW.
Given today's day and age, where multiplayer aspect of the game is far more attractive than doing things solo. External models of the aircraft we fly and interact with on regular basis in the game need to be of a certain level of quality - otherwise, at least for me, it lowers immersion and overall level of expectation from the simulation. That level of quality is not met by the 27 model that just happens to be what me and my fellow squad mates fly (used to fly - now that FC3 is out) in rather intimate formations, and even if flown outside of formations given FC3's missile mechanics (under developed) the fight normally evolves into WVR where external models, once again become relevant.
To conclude, I feel that objects that are interacted with by players on a consistent basis, especially in multiplayer environment, must have a minimum level of detail in both 3D shape and texture to be considered worthy of the product.
Thanks to Hungaro we now have a model that doesn't result in explosive puking when lining up for a fingertip take off. :thumbup: