That’s a nice old 2Gen S&W, and the beauty part is that new double-stack mags are available everywhere for it. Finding mags for the single single stack Smith’s and the .40 & .45 calibers are getting like hen’s teeth.
Back when I bought my Sig P6 I learned my lesson in buying old ex-LEO service pistols, that is to make sure you can still get good magazines for it. You can keep the ProMags, I now have 7 OEM mags that all work great.