You would get the 1350w PS. Power-Supplies only draw what power the components need. If you run out of power, the computer will just turn-off itself (that's bad). When a 1350w PS is only drawing 800w or 1000w ... it will run cooler than a small one. A 2tb M.2-NVMe SSD is good (as C-Drive). I suggest you pass on the 2tb 7200rpm spinning-platter HDD, and get a 2tb SSD (as D-Drive) instead ... another M.2-NVMe SSD or at least a 2.5inch-SATA-3/600 SSD. There is no good reason to put a old-school HDD inside a nice machine like that now-days.  
I’m about to buy an Aurora R15 (i7-1300KF, 32GB 5200 RAM, 2TB M.2 SSD, 2TB 7200 HDD for storage, Nvidia 3090 24GB RAM). I’m worried I’ll trip circuit breakers in my older apartment building with the 1350 PSU. Would I be fine with the 750W Cryo-tech option? If so, would I be able to upgrade to a Nvidia 4080 in a few years if I go with the 750W PSU? Thanks for any advice!
Aurora R15, about to purchase, will the 750W PSU be enough?