@elkikko:
Global is the best? Or something else?
Each A&A is best for something different.
1941 is best for an evening game (as the others take longer) or as an introduction to new players, being easier to explain and get a game going (in my view at least).
1942 is best for a day game (as 1940 takes longer) and some on this forum will highlight various benefits over 1940. Here is an example:
http://www.axisandallies.org/forums/index.php?topic=36052.msg1418663#msg1418663
1940 is much loved by many, but can be difficult to play face to face given the time it takes.
My own newbie path was via 1941 6 months ago to 1942 a few months later to a 1940 game now being played “by forum” (i.e. playing by computer against an opponent on this forum, with each player posting his turns in one of these boards). I am enjoying all the extra nuances and elements of 1940, but grateful that I did not start with it. This progression path appears fairly common among those who began with A&A since these variants all became available.
What is “best” for you will depend on your A&A experience and personal preferences. If you are a newbie I would recommend the path I took.