“Best” is a very personal and subjective term.
I think Anniversary Edition is the “best” of all A&A editions. However, it was a limited edition and you’d be hard pressed to find a copy that is reasonably priced, even used at this point in time.
Others think Spring 1942 2nd Edition is the best. However, it is a shorter game with fewer details than some of the others (1 step up from the “introductory level” 1941 edition), but still quite fun.
Many consider the 1940 Pacific/Europe editions the best. However, they are much more involved, longer games (and requires the purchase of 2 games to combine them into one if you want the global experience).
TL;DR - Nobody can answer your question. It’s a personal preference, and we don’t know what you’re looking for.