Oh, I know the feeling - there's always something to improve
I must have misread your profile info - I thought it said i7-4790 - my bad!
If you take a look at
https://cpu.userbenchmark.com/Compare/Intel-Core-i7-4790K-vs-Intel-Core-i7-4770/2384vs1978 there's apparently only a performance increase of 10% - my guess is still that in everyday use, you won't be able to feel much of a difference, if any at all.
If you were faced with starting your build and had the choice, obviously you should go for the 4790K over the 4770 if price diff was neglible. But as a performance mod if you're looking for something, I'd go for getting for instance an NVMe SSD and setting up to run the OS from that instead (if you haven't already)