How good CPU for dual GPU beginner projects + gaming on the side?

Hello, building my first PC and looking for some advice. I am CS undergrad and want to start training small projects on my own while using the PC for gaming as well.

Currently I am planning to get Nvidia RTX 4070 as one of my GPUs (the one I will also game on) and something like 4060 16gb to train small models. Maybe upgrading to 50 series later if there are significant performance increases.

So currently I am thinking of …

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