I'm not bashing your decision to buy S&W, but did want to relate some information.
Most all law enforcement agencies in Florida carried the S&W 9mm when I moved here in '89. Most determined that the 9mm just doesn't have the stopping power needed, so the research started and most agencies switched to .45 cal and most went to S&W. Well made and reliable.
Soon they realized that 9 rounds ain't enough and the switch to .40 cal was on. This time Glock figured prominently in the equation and far out performed the S&W .40 cal pistols. Very well made, fewer moving parts, better warranty, can drop it in the dirt and sand then pick it up and keep shooting, non exposed hammer is nice too.
I carry the model Glock model 23 and 2 weeks ago shot a perfect 250 out of 250 on my department test and 40 out of 40 on the Florida Department of Law Enforcement test (which is mandated by the State.) I honestly don't think I would have shot as well with most other guns.