Don,

I have had both G2 and G3.

G2 is really good as well. The planes on G3 are much more detailed visually and when you do crash pieces come of. In G2 they stay in one piece. Flight dynamics see a bit more better in G3


As Ken said, G2 will be just fine.

I find Aerofly is better for 3D training as it's flight dynamics are way better but the graphics need some work.

The thing with G2/G3 are thses are planes that are actually for sale from Great Planes and Aerofly uses planes from multiple vendors that are not quite to the "scale" of the model

So for my IMAC stuff I'll use G3. For my 3D stuff it's Aerofly