Regardless of which side you take in the eternal 9mm versus .45ACP debate, you have to admire someone who makes up their mind based on well reasoned thought and research and can then articulate why they chose the way that they did. Paul Gomez lays out his decision making process on the matter as well as just about anyone that I have seen. This video is worth watching regardless of which side you take.
Everyone I know that is already aware of the Miami Massacre and FBI/NIJ/IWBA findings on ballistic wounding, etc. already pretty much stays out of the 9mm 45 debate.
A majority of them carry 9mm, but none of them carry their chosen pistol for a supposed superiority of ballistic performance.
Definitely a well reasoned approach to the debate. Neither totally bashing/supporting either side.