As far as S&Ws go, there is also the amazing S&W Performance Center 952. Expect to pay around $1800-$2500, though.

Single action, 9 round single stack magazine, match barrel, titanium coated bushing, adjustable sights, and a hand fitted slide/frame. Many of the internal parts are coated with titanium as well. Available with a 5" or 6" barrel.




Product: Model 952 Long Slide
Product: Model 952 Pistol



Outside of S&W, and besides the Sigs that were already mentioned, Kahr makes some nice single stack DAO 9mms. They're available with both polymer frames (the TP, P, and PM series) and steel frames (the T, K, and MK series). And Springfield's microcompact 9mm 1911, the EMP, is a nice little single stack 9mm. Several other 1911 makers offer single stack 9mm versions as well.