No sense to go with 1080ti unless you have 1440p or 4K monitor.
R 1600 comes with cooler that is good enough for the job, no need to go for fortis 3.
I'd rather swap vero M2 for supremo M2 V2 (although highest version is 550 W, a bit too low for 1080ti).
Have you considered i5-8600K, Z370 mobo and 1080 instead?