New PC builder (need help) any advice

I've been seeing a lot of good builds put together by customers this morning and this is another one. Solid all around. The only thing I'm going to suggest here is the RAM.  You're building an AMD system, so try to go for DDR4 3600@CL16. I've mentioned this quite a bit before. The main reason is it's just as high as you comfortably can on the Zen 2 platform. You'll be at 1800Mhz on your three memory related clocks (mclk, fclk, uclk). Past 1800Mhz on the fclk(Infinity Fabric) is where you tend to become unstable. You want those clocks synced, and they'll do so automatically up until roughly 1866Mhz(3733Mhz). 

This is just a suggestion to maximize performance and be more on par with comparable Intel platforms. With AMD's CCX design memory latency is increased, but you can push higher frequencies to compensate for it and I would recommend it. Especially since these good 3600 CL16 IC's which I believe are Hynix C-Die, seem to be shooting up in price.

I own the LanCool II and like it pretty well. It's a cavern, good cooler height. It'll fit a 360mm radiator in the front. Good case all around.