If I was to build a gaming machine right now, then here is what I would do.
1. Go for one based on the AMD AM5 platform and get a modest CPU like the 7600. AMD has promised their AM5 platform will see new CPU till at least 2025 and maybe longer, so this means the option of upgrading the CPU really easy in2-3 years (they did the same with their AM4 platform).
2. Forget about buying a GPU for ray tracing now, since only the very fastest will do that with good enough frame rate. Instead I would go for the best non-RT performance within my budget, a likely contender would then be a 6800 or 6800 XT or maybe a 3070.
AMD is bringing out their x3D CPU's for the AM5 platform in two weeks or so, it may be worth waiting and see what they bring before buying.
Also on ram, the fast DDr5 is expensive right now, so it may be worth sticking with just 16 for now. Also do look into what is the sweet spot with the CPU you choose, no reason to buy something that doesn't bring performance.