Here is an option from Lenovo (IBM sold off the PC business to Lenovo) with AMD for around 1200 dollars. Not a good deal compared to a DIY as you only get 8 cores and need to add more memory. But like Dell they have good service options and you can add a 49$ Bluray USB drive.

https://www.lenovo.com/us/en/p/desktops/legion-desktops/legion-t-series-towers/legion-tower-5-gen-8-(26l,-amd)/90ux0001us#compatible_acc

If you live near a Microcenter in the US, they should be able to hook you up with a perfect DIY, within budget and offer service options like the big boys at Dell or Lenovo.

https://www.microcenter.com/