Which PzC game to buy?

[CountryBoy]

Certainly understand the AI is not going to be the perfect opponent, but once I'm across the rules and game mechanics, I'll switch across to PBEM.

I did read something in a post which made me wonder - if you start your PBEM turn, can you save your progress partway through your turn and exit the game? If you're playing a large scenario for example and don't have time to move all your units?