Ok so im considering to get either i5-4690k or i7-4790k because my amd cpu is bottlenecking my gpu hard. In my area, i7-4790k is $60 more than i5-4690k. Is i7-4790k rly worth the 60 extra? Im prob gna be using this cpu for like 4 years.
Yes, for a 4 year investment the i7 is worth the extra $60.
That's a great price and for the equivalent of $15 a year you have a faster CPU with access to hyperthreading, which would make multitasking and multimedia activities much more efficient. Newer games are also slowly starting to incorporate more support for hypterthreading, so in the long run the i7 would be a great choice if you can afford it.