I have shot my boss's Xdm 9mm, but not a . 45. I am a . 45 guy too, but I prefer the 1911 style.
Her Xdm shot really nice. It was her first pistol and she asked me to teach her to shoot it. Did not experience any malfunctions over about 500 rounds between the two of us. Her's was pretty accurate (if you knew how to shoot it). She was all over the target, and blamed the gun until I put 10 rounds in 1" at the same distance. That is when she decided she needed more practice. :-laf
Her's was a really nice pistol, and I don't see why the . 45 version would be any different. I just had a hard time getting used to the safety on the trigger. For some reason it really freaked me out.
There is a handgun show on Direct TV that is doing an ongoing torture test of an Xdm 9mm. Over the last few weeks, they have buried the same pistol in sand, mud, submerged in salt water, run over by a truck, drug behind the truck, thrown off a roof multiple times (these are just the episodes I have seen), and the same pistol always comes up shooting. If their . 45 is even half that tough, I don't think you would go wrong.
Congrats on getting Concealed Carry passed. Have you thought about a holster and belt combination?
Hope this helps.