Ok. So I suggest you look up in Google your photo editing software's Ryzen benchmarks. ie: Photoshop Ryzen Benchmark. A Ryzen 1700 is cheaper than a 7700k, it can be overclocked normally to around 3.9ghz to 4ghz depending on the silicon lottery and includes a fairly good air cooler so you might not need to buy an AIO. No need to pay for a Ryzen 1700X or Ryzen 1800X as they all overclock very similarly. A Ryzen B350 motherboard which is all you need for Ryzen is cheaper than a Ryzen X370 motherboard which again is cheaper than a Intel Z270 motherboard. So if your workload looks good in Ryzen benchmarks I really suggest getting Ryzen not Intel for the cost savings and potential similar to better performance depending on use case.

The only reason I recommend Intel these days is if your goals fall into very specific categories, for instance I want the absolute maximum FPS I can get so I went with a 7700k. If you can sacrifice a few frames, like 5 to 10 frames but still keeping the total framerate above 60fps then I don't think the 7700k is the best choice because of price of the CPU, motherboard and cooling plus the fact the 7700k is super hot.

After you have done the research as to i7 vs Ryzen for your use case goto https://au.pcpartpicker.com/ and make a build and post the link in this thread so I can give you better advise.

As for what you posted so far, M.2 drives are great in theory, but in reality you don't get a huge increase in access speeds over SATA because 99% of what users do is at low queue depths and you only get the benefit of M.2 NVMe SSDs at high queue depths so I really suggest a single M.2 SSD for your Windows install at most and the rest of your drives as cheaper SATA SSDs. Also Optane slows down SSD's so forget about it until the Optane PCIe SSD comes out next year (that will require an Intel system not Ryzen), but that drive will be something like $1000 for 256gb so very bad bang for the buck. Also if you do get that MSI Z270 motherboard or any other motherboard with a "heat shield" for the SSD remove the heat shield because it actually increases to temperature of the SSD and can lead to thermal throttling.