I went through the same decision process last summer trying to decide between the GLOCK G26 9mm and the G27 .40S&W. I ended up selecting the G26 primarily for the added capacity. I feel very confident in modern 9mm ammo and have no concern with being under gunned.
Let me say I also own and really like an HK USP40 so I am by no means against the .40S&W round.
A major source of objection to a free economy is precisely that it ... gives people what they want instead of what a particular group thinks they ought to want. Underlying most arguments against the free market is a lack of belief in freedom itself.
- Milton Friedman