The Pitch and Enduro seem like a little much. The FSR would be fine, especially with fancy dampers on the suspension. As others have said, in beginner and sport, there's a huge range of skill and fitness levels, and people roll up to the start line on all sorts of different bikes. I don't think I've seen anyone do expert on anything but a purpose-built XC bike (not necessarily new ones, though.) But it doesn't sound like that's your plan, so get whatever you'll have more fun on.
IMHO, most company's "Trail" category is their apology for turning the "XC" category into the "XC Race" or "Weight Weenie" category to the exclusion of riders who'd like a little more versatility.
Do you have anything remotely suitable in your stable now? You'll have a better idea what you're looking for if you go to a race or two before spending a bunch of money.