AM gives you much more capability han you say you’re going to use, so whilst it’ll be fine and rideable, it’ll be softer, heavier and harder work than either the XC or hardtail. Work out what you mostly want, then try a couple of bikes to see. FS is great but heavier unless you start spending lots of cash; in your shows I’d look at short travel FS at 100 mm or so, and good hardtails, with a pref for the hardtail.
Have learned there’s no such thing as one perfect bike – ride some either on demo days, hire, or borrow from LBS or friends – see what floats your boat then buy it and ride it some more. (mind you, if. I rode as much as I posted on here, I’d be much fitter!)