You are right in choosing 32GB as a good fit for the rest of your system.
I will only comment on G Skill as I have personally had good luck with their RAM (always from Newegg) over the years in various Gigabyte and Asus builds.
Suggest you use:
- 1600MHz (sweet spot; slower is slower, and faster buys you very, very, very little for Adobe CC)
- CAS 9/9/9/24 should be fine; get faster if the incremental cost is slight
- 1.5v or less
- sticks sold in a 32GB set
- exact p/n's listed on G Skill's web site RAM configurator for your exact motherboard; this tool is under the "support" menu on their web site which is not where one might expect to find it
Yes, 2133 MHz should work.
Again, your speed gains vs. 1600 MHz memory will be marginal so don't spend too much extra for the faster sticks.