The P320 X5 Legion I picked up is just such a great design, and is SO WELL balanced. I can't say enough great things about it.
The trigger is sweet compared to the stock X5, but I am sending mine off to Robert Burke (The SIG Armorer) for some customer trigger work.
X5 is good.
Legion is good.
X5 anf Legion in the same gun? Much more good-er!