...but s little as I know about Intel, I know even less about AMD...
Don't be ashamed:
There really hasn't been much reason to know about AMD CPUs for long time.
Their performance has been from struggling to badly struggling, while consuming metric ****-ton of electricity:
https://techreport.com/review/24879/intel-core-i7-4770k-and-4950hq-haswell-processors-reviewed/7
Reminds me about one humorous line:
I may be slow, but I do poor work.
That's why AMD didn't even release new higher end CPUs for many years.
Release of new design from scratch Ryzen year ago changed that.
In most games Intel has advantage, but it's not major and in power efficiency Ryzen is equal.
And with Intel you'll be basically stuck with that CPU, until you're willing to buy whole new motherboard, CPU and likely also new RAM.
Zen+/Ryzen 2 CPUs, which are released in couple weeks (if you can wait little) increase clock speeds little and along with cache/memory latency improvements that should narrow down Intel's advantage.
While you get option of upgrading just CPU in two years.
And unlike Intel's one or two percent faster CPU always needing new socket, AMD has more significant performance increases scheduled.
450W! Was I just overcompensating on my 600W? Or have things become more energy efficient in those years?
For GTX1060 level graphics card and stock CPUs 450W PSU are well enough.
But if you'll sometime upgrade to higher level GPU or overclock, 550W PSU would have good room to spare.
And you can pretty much plan to use quality PSU upwards 10 years.
Which is warranty length Seasonic gives for Focus Plus.
https://www.overclockers.co.uk/seas...plus-gold-modular-power-supply-ca-05p-ss.html
If you'll get that Thermaltake case Bitfenix Formula has fixed cables meaning unneeded cables might show from window:
https://www.overclockers.co.uk/bitfenix-formula-series-550w-80-plus-gold-power-supply-ca-22y-bx.html
With modular PSU you don't have to hide those unneeded cables, you simply won't connect them to PSU.
While those who know my case taste better might doubt it I kinda like look of that Thermaltake.
Though one downside of it is that cheese grater front leaking out any slightest noise.
It simply can't muffle any noises created by parts inside it.
Which is why in case of Intel CPUs you'll want to have better than stock cooler even without any overclocking:
Intel has long used chronically under sized stock HSFs for enthusiast use.
(basically sized to work quietly in web surfing/word processing PC)