I've always been a 9MM Luger guy, specifically in the Browning High Power. They have been offering it in .40 for sometime now, I'm just so used to 9mm. I'm looking at a new semi auto pistol for a new motorcycle. I was looking at the Bass Pro flyer and they had a S&W .40 that looked like it would work, but then I have another type of ammo to buy. I have tons of 9mm already, so is the .40 such a superior round as to justify the ammo expense, or just stick with the good old 9mm?