what kind of gaming PC should I buy?
what do you mean?
are you expecting a recommendation for a specific system model?
this is possible if ordering from some manufacturers like ASUS, MSI, Dell, etc.
though in the majority of these instances you will be paying an extra $200-500 just for branding and a lot of the time they are not the best builds.
usually when ordering a pre-built PC you would be picking and choosing which components you want installed
and which case you may want for them to be installed in.
i would never recommend going this route unless you have a local computer shop that will help walk you through and will always be there for face-to-face repairs, questions, etc vs mailing your system back & forth for...