I've been shooting a X-5 L1 for a couple of years; a X-5 competition for a couple of years before that. And, up until a few months ago shot a X-6 L1 for four years. They're hard pistols to beat. Silky smooth triggers with a clean break, highly accurate. And, the pistols are very well finished. I preferred them to the SIG p210 6, Swiss made. However, the p210 is a duty gun, a different animal, entirely.
I can't say the SIGs are any more accurate than a Witness Elite Limited and a STI Match Master, both of which I shoot regularly. Shooting from a sand bag rest all are capable of putting five rounds thru a single hole in a one inch bullseye. If the STI trigger was adjustable it would challenge the X-Series pistols. The Witness trigger is just a bit rough, but breaks clean.
If I was a little closer to Florence, I be tempted.