I think you should fit floating discs with opposed piston calipers. There's a degree of self-alignment which is important.
Early 1200's had solid discs which were notorious for warping. Mine went in the first 3k miles. The first model Multistrada had exactly the same setup and guess what...?
I upgraded the solid front disc on my X-Country to a fully floating Brembo and found it a good improvement. Even with a two piston sliding caliper, the solid OEM disc was dished in 13k miles.