I also started out on Revised and played it exclusively for a while. Now I have Pacific and Europe 1940 which, I think it’s safe to say, blow Revised out of the water. The scale of the games, especially when combined, is enormous, as Calvin pointed out. My experience with them, and I imagine the majority of players,has been a lot better than Revised (which isn’t to say anything negative about the latter, that’s just how good the 40’s are!) I suggest you head over to the other forums and search for a game that looks interesting to you. There are theater specific games, Guadalcanal, D-Day, and Battle of the Bulge, but I don’t have any experience with those.
In short, I recommend Europe and Pacific 1940. They’re pretty expensive, but I’d say they’re definitely the right way to go if you want to expand into A and A.