I recently uninstalled CFS3 to free up some disk space. I'd been disappointed with with, and found it in many ways not as good as CFS3
The top WWII combat flight sim at the moment I think would have to be IL2: Forgotten Battles, this is the followup to IL2 Sturmovik, and has more features, more areas, and more planes than its predecessor. The night missions with searchlamps are marvellous!
Oh, and you can fly a Hurricane in this game. I believe they're going to add a Spitfire as a downloadable upgrade.