If you haven’t done so, stick with the I7-10k , you will run mfsf just fine, , I have the same setup and I don’t see any issues, even an i9-9k paired with a 4090 they both run just fine , this all CPU thing is a propaganda about you need to upgrade, nahh, when doing so , you have to come up with new mobo, new ram , new everything, for what, for having the same results, nahh , mfsf running at 45 fps you will have a awesome experience you don’t need nothing else… Believe me if I do upgrade? I would go for a future proof GPU , that’s all you needed my friend
How did it end? Did you get the card? are you happy? 