A 5600x will match well with any GPU up to a 4070TI which would plenty for 1440p. However, if you budget will only stretch to that of a console, I would probably consider the 4060TI.
But what it all comes down to, at least for me, is exclusives. If you want to play those PlayStation exclusives and experience it's unique features, buy the PS5. Otherwise, it makes more sense to upgrade your PC instead.