The 7900x3d isn’t that great of a gaming CPU, you’d be better off with the single CCD 7800x3d.
But if you’re going for high end why wouldn’t you go for the 9800x3d/9950x3d? The only reason I picked the 7000 series was the lack of availability with the 9000 series x3d at the moment. And if you’re getting 90000 series x870e offers a lot of features as standard over x670e.
If it’s just for gaming, you really don’t need the absolute top of the line in terms of CPU. I can’t think of a game I’ve ever played that maxes out my CPU on all cores.
Unless you’re also using it for CPU-specific and intensive work outside of gaming, you won’t gain much from spending more money.
I built a 9800x3d + 7900xt + 64gb ddr5 + 2tb nvme ssd + 12 tb hdd setup for about 2k usd.
Now they mentioned a 1200 GPU cost which is almost 500 more than what i paid, so I would have paid 2.5k with that gpu.
My RAM speed and motherboard could be upgraded. But I don’t see how those upgrades add up to 2.5k. You could go for more ssd memory for a purely gaming rig, but you could get a lot of that money from not buying a 12 tb hdd which is not a gaming rig thing to buy.