VAU23 A power supply issue can damage any and all components on a computer, so that may have been the only real problem. It's impossible to diagnose at this point though.
If you do want a computer with a 4060 ti, I can probably find something cheaper, although apparently not from Best Buy at the moment. (I checked.) Even though you don't mind the price, it doesn't make sense to pay extra without getting an upgrade. Let me know if you'd like other suggestions. Or just go with one you've already picked out. Or if you do want the 4060 ti, consider this one with a faster processor:
https://www.bestbuy.com/site/cyberpowerpc-gamer-master-gaming-desktop-amd-ryzen-7-9700x-16gb-memory-nvidia-geforce-rtx-4060-ti-8gb-2tb-ssd-white/6593752.p?skuId=6593752
Yes it "only" has 16 GB RAM, but that's the easiest component to upgrade, and doing so should be cheap by the time you need to, if you ever need to.