I've always liked those as well. I have Action #17, 22, & 30 which I think all qualify.
As far as how I narrow my collecting focus, it isn't easy. With a limited budget, I decided to focus on Action Comics #20 & under and then the war covers only from #21 up. I also have a few other random issues on my wish list mostly due to the cool covers, characters, etc (like Superman #3, U.S.A. #7 and others). That being said, I still break from my focus from time to time when I see a good deal on a nice book.