Any 'real' Operational level Wargames out there?

[Bismarck]

Thanks for all replies, I must admit I was a little tempted by the HPS Panzer campaign games, even though the graphics are dated and they focus on individual battles (or mini campaigns I suppose)..do they run ok on Windows 7?

I think I will go with the decisive campaign games, the interface looks user friendly and from reading some excellent AAR's (thanks Keunert!) they don't seem too overwhelming.

Wise choice, grasshopper.