Thinking of upgrading my GPU

When I got my PC a few years back, my idea (since I didn't have all the money in the world) was to have all of my PC specs as powerful and future proof ad possible while maintaining a decent price, and just using a relatively old GPU so that I can reduce the price to something more manageable. So I have my PC for a few years now and (obviously) I feel like I could use a newer GPU since it's starting to lack a bit with newer games.

This is my build: CPU - Intel i7 11700 Ram - 32 GB (I don't remember which specific brand it was) Motherboard - GIGABYTE B560 GPU - GTX 1650 SSD - Samsung 1T 980 NVME Power supply - ENERMAX FAN12 600W PC case - antec p120

So my question is - what would be the best GPU to upgrade to that would be efficient with my PC build (don't want to waste my money on an all powerful 4090 just for my PC to not efficiently use it's power) and not too expensive? I would really appreciate any help