For a single stack in 45acp, the full size Sig P220 is one of the best out there. My older W. German model is accurate and reliable. Later models used to come in carry and compact models, as well. In 9mm, the P6 (P225) is a great choice. It's essentially a smaller version of the 220. I much preferred it over the 239, which I sold. Once again, my P6 is an older W. German model. I'm a big fan of DA/SA, hammer fired semi-autos, especially classic ones.