You’ll regret buying nvidia for gaming on Linux, if your Linux skills aren’t well honed. You’ll just be setting yourself up for a lot headaches, as their drivers still don’t play well with Linux.
I’m really not sure why you even bothered asking, when you intend to disregard most of the warnings regarding nvidia anyways.
So let me get this straight, you don’t feel up to the task of installing Bazzite on your new computer, but you feel you’re accomplished enough with Linux to handle the inevitable issues that you’ll have to deal with running an nvidia gpu.
I guess I’ll need to keep one eye on the help requests on the Bazzite forum to see how well that new nvidia gpu works out for you. 
Well, as it appears you’ve made your mind up on your hardware purchase, I think we can put this thread to rest now.
Good luck with your Bazzite and Nvidia choices. 