[dgludwig]

I have two .40 S&W cal. pistols, an HK USP 40 and a Smith Model 4006, that are my favorite forties. As others have mentioned, both of these pistols were designed around the .40 cal. and I think their stellar performances in terms of handling, accuracy, functioning and long-term durability reflect said design parameters. One bonus for opting for the discontinued Model 4006 is that good condition police trade-ins can still be had at very reasonable prices.