I love my XDM 4.5" in 45acp. It is my primary, go-to, bedside gun. However, I'm not a fan of the XDs, but for ergonomic issues. If I need a small single stack, I've been more happy with 9mm. Being limited in the XDs to only 5+1 doesn't interest me much. Personally, I'd rather (and DO) carry a commander 1911 when I want 45acp. I have a SW1911Sc and love it! My small single-stack is a Kahr CM9.
I will, however, be VERY interested in a XDs in 9mm.
.45acp, .40 S&W, 9mm, .38 Spl, .380 acp, 22lr
12 gauge, .223/5.56x45mm, 30-30 Winchester
2 Chron. 7:14 Christians must seek His face