I'd say the biggest difference would be buying a 250-256gb SSD, which will help significantly with boot and loading times. Nothing wrong with your mobo or cpu or graphics card. I'm not sure what performance issues you'd be having, are you getting low framerates? What model of PSU you have? If you really want a new mobo I'd recommend either the Gigabyte Z97X-UD3H or UD5H.
J