I haven't shot a FNX-45, and don't care for Glocks (Sorry, just not a fan), so I would have to say CZ97. Great guns. Well, the ones with no de-cocker anyway, and I'm a 1911 fan as well, but since it wasn't a choice.
That is my next toy except the Equinox model.Ummmm Sig P220. Sorry.
I also have a Glock 21 and RIA 1911 Tactical and am happy with both of these guns.I'm a satisfied Glock owner, and also a proponent of keeping consistent manuals of arms whenever possible, so I feel compelled to suggest the G41. I mean, everything about it that's different from other Glocks was put there specifically for range use, which is what the OP wants. That said, if I ever buy a 45 (don't own one currently), it will be a 1911. So those are my recommendations. Look within and you'll feel the pull toward the 1911. But if by some freak chance you don't, the G41 is there for you.
... I can't think of any other lightweight 5-inch 1911s offhand.
Maybe, but the guy asking about alloy full size 1911s certainly does.He doesn't want a 1911
and the resulting headaches.