I cant argue with ya on that note driftrider, a well placed 9mm is better then a poorly placed 45 so in that aspect use what you shoot the best and are most comfortable with. I like my 45's and shoot my 45's very well. i also have a few 9's and a 40 which i shoot well with too just my preference is a 45.
Also a cousin of mine is a retired SEAL I asked him if they only used hard ball ammo in their 45's he said that they used every type of projectile depending on what they were doing and his favorite is Extreme shock's 185gr Tungsten-Nytrilium ammunition.
heres a picture of my choice for casual conceal and carry I can conceal this wearing shorts and a tank top and its a 45 what I like best is its a DAO pistol but still has a manual safety and will operate even without a magazine in it unlike springfields XD series and rugers new P-345.