You know, from a person who has suffered from fps problems since day one of online flight sims, really, what more can you do at 75 fps, that you can't do at 50 fps? I mean after 30-35 it gets smooth to human eye, so what is the deal of having 50+?
This takes for granted you're getting at least 30 fps in furballs over fields. If not, I can well understand the problems.