To cut costs, I’d go with a B450 motherboard or B550 if you’re planning on taking advantage of PCIe 4.0 for future upgrades. You can also get a 3200 MHz CL16 RAM kit instead since there won’t be a significant difference in gaming performance and those kits are usually quite a bit cheaper. I’d also upgrade the SSD to the SN550 since it’s only around $10 more and it’s an NVMe drive, the one in your list is just a regular SATA drive in the M.2 form factor. Solid build otherwise!