Jesus Christ you are clearly not experienced enough to give this advice on PCs. I haven't read the cancerous thread above but obviously your ego has gotten above your head on this one mate.
You're right about getting a decent case with good airflow, a good case is nicer on the eyes and easier to build with and maintain (dust filters, screwless things e.t.c). But here's some constructive criticism.
1. ****No you absolutely do NOT need 32Gb RAM**** and with that budget the very obvious approach is a 4 slot motherboard with two 8GB modules (obvs in dual channel) for upgradability. The impact of the speed of modules and CAS latency on performance tends to depend on individual CPU/motherboard
2. You're recommending CPUs which are the last generation of AM4 which whilst I'm not entirely caught up, might be the best current bang for buck for performance at the moment but if you factor in future upgrades you should definitely consider DDR5 compatible motherboards which will have a longer lifespan, meaning the next CPU upgrade wont involve a RAM+Motherboard upgrade which would be 100% certain if opting for am4.
3. When you say "good PSU" you need to be more specific because a newcomer won't know what that means. You'd want a minimum 80+ Bronze certified PSU from a reputable manufacturer such as Seasonic, EVGA, BeQuiet, Corsair. (It's worth knowing there are only about three OEMs for PSUs and a dodgy one can range from inconvenient to fatal for your system). Also I'd go for 700-750W simply because of trends in GPU markets and PSUs, better safe than out of pocket. Your PSU should be one of the longest lasting components in your system which is why good ones have 5-10 year warranties.
Another side note is that sometimes you can save a lot of performance/£$ by waiting just a bit of time for new components to be released, but there are always nuances to this like availability and waiting for benchmarks. But if you're always waiting for the next thing you'll never get gaming! So it's tricky, there's a lot more to building a PC than simply a budget and specs.