As soon as I read the title, I knew someone had come across one of Yeager's videos.
In all honesty, 9mm, 40 S&W, and .45 ACP are all pretty much the same when factoring in round size, capacity, etc. I prefer the 9mm, but thats just what's best for me.
James Yeager has some good points, but too many times he gets a little fanatical.
If you have watched any of his videos, you need to watch this video
hosted by one of the mods at one of the other forums I'm a member on. James answers questions we have always wondered about him, such as ".40 cal Glock or 9mm 1911"