i LOVE Arlon! If I'm not mistaken, DPF 4560 is a 5year intermediate calendared vinyl. should be just fine for nearly any flat application.
Curling edges? its not the material, its you. ...or at least your selection of material for the application, or improper application, or oversaturating with ink, or not letting dry prior to lamination, or too much tension on your laminate roll during lamination. sorry to say.
3M will tell you the same when their material starts lifting, and most if not all cases... they're correct.
3M, Arlon, Oracal, Mactac, and Avery(...post-2005) these guys don't make cheap vinyl.
If Fellers trusts em', then you can too. ...for the right process/application.