This is a nice post and should be helpful for folks buying their first handgun.
While I don't necessarily disagree with anything articulated, can I suggest that the format be changed slightly? I recommend that any opinions/considerations be perhaps segregated and/or highlighted as such. Just picking an example and again, not necessarily disagreeing with anything said, the last paragraph of the Caliber section seems suggestive of getting 9mm because is available and cheap but 45acp is what people should really want. This may steer people towards a less than suitable choice for their specific needs.