I bought a regular Sig P320 at Engage a couple of years ago during one of their Black Friday sales. It is not one of their newer X-models, but I like it so much that I sent it to the Sig Armorer and got a trigger job done and also had him mill the slide and install a Trijicon RMR. It is a great handgun and would probably be one of my EDC's if I only had a CCW. I was practicing my shooting with it at The Machine Gun Nest last weekend.
By the way, I rented the Sig P320 Legion full size version that they had on the display case at The Machine Gun Nest and it was brilliant. I am tempted to make it my next purchase but we'll see....!
I hope you get the Sig P320 and enjoy it as much as I enjoy mine.