I guess it depends on how long you plan to use it. If it's supposed to last a long time, i would go for one which has 4 additional pcie gen 4 lanes for a fast SSD. I kinda doubt that you will need it, but it's possible that all the bs marketing talk from microsoft and sony about their ssds and how it will be necessary contains some truth, and then you want the option to put in an actually fast ssd in the future. Well, if it's not that much a price hike. There's some DX12 extension which will allow direct SSD access for the GPU or something. If that really becomes a big thing, you will need a fast ssd.
Oh, and when getting a Zen 3 cpu, i highly recommend to a get 4 stick memory kit as it stands now:
https://www.youtube.com/watch?v=-UkGu6A-6sQ
preferably with really low latency. I read that there's some upcoming DDR4-3600 CL14 memory, which sounds really nice. Well, it depends on the price of course. But 50 bucks here might be more worth than a 5800X over a 5600X according to Gamers Nexus' benchmark results of both cpus. (but that's a really small sample size)
Oh, and when getting a Zen 3 cpu, i highly recommend to a get 4 stick memory kit as it stands now:
https://www.youtube.com/watch?v=-UkGu6A-6sQ
preferably with really low latency. I read that there's some upcoming DDR4-3600 CL14 memory, which sounds really nice. Well, it depends on the price of course. But 50 bucks here might be more worth than a 5800X over a 5600X according to Gamers Nexus' benchmark results of both cpus. (but that's a really small sample size)