Ram support is much better now than at launch, but don't buy just anything that says 3200 on it.
Trident Z Gskill I have seen a lot of people hit 3200 with, and is cheaper than the Flarex I bought.
Basically you want to buy a kit that is on your motherboard's QVL list.
Qualified Vendor List.
You can look this up online at the mobo's website. since the list in the mobo manual is likely out of date relative to the latest bios.
In general, ram that has Samsung B die at it's heart is the best stuff.
It's also the most expensive........ I'd do some Googling and Youtubing, keeping in mind that just because person A hit x ram speed and timings, doesn't automatically mean you will.
A good 3000 CAS 16 kit is like... !/2 ish the price of what I paid? More or less?
The performance difference isn't huge.
So you need to decide if it is "worth it"
For me I decided it was, because I intend to drop a 3rd gen Ryzen in to this same mobo with maybe a bios flash 3-ish years from now, and be happy for another 2 years after that, as far as core components go.
So dropping that extra cash on top shelf Ryzen ram made sense to me.
Your Mileage May Vary.