I have Axis & Allies Second Edition, Revised, Europe, and Pacific. I am partial to Pacific, and in some repects prefer Second Edition to Revised. I do not like the Revised map board, as it is too dark. I am thinking of adding the destroyer and artillery rules to Second Edition, and using the newer plastic pieces.
I also have Xeno Games Pacific at War, and I am impressed with the rules, and may play that with the Axis and Allies pieces. I have the Attack series of games as well, and I am looking at incorporating some to the ideas from there in the rules as well. I like the technology and political action cards.
I have worked up a card event deck for the Allies in A & A 2nd Edition, and am working on the Axis deck. I will be doing a deck for the A & A Pacific game next, with the Revised and Europe decks following in that order.