So, I built my current rig in 2012 and it has an MSI Z77 mobo, i5 3550 CPU, and am MSI 660ti. I'm getting the itch to upgrade, but after reading a bit about Intel's recent CPU offerings I'm having a hard time justifying the expense to upgrade the mobo and CPU. The GPU is a much easier decision as I can pick up a GTX 970 for less than I paid for my 660 ti and the performance increase is substantial.
My question is as stated in the title. Is there a compelling reason to upgrade the mobo/CPU combo? Am I missing something? I primarily game with this setup and I can't think of any specific examples of where I've been CPU bottle necked. Thanks for your opinions in advance.