Just so you do know helldivers will be bottlenecked on the cpu with any reasonable gpu upgrade so don't worry too hard about unbalancing it a bit more if you wanted to go for a 4060ti instead. You're getting a nice upgrade but the 9600k is still only 6 cores just keep in mind. Modern stuff is going to be tough. This year's games are kicking my own 9700k ass at 1440p.
I have a 4070ti and it's chilling at like 60% much of the time on games like helldivers or marvel rivals so when I do upgrade it'll be massive. I can play games from 2018 at a bajillion fames though. Just wanted to give you my acedotal for your brain pocket.