Sorry for the double post but I need an opinion.

Will I really benefit much from going Intel (not getting anything below a 4770k) compared to my current system? Or would I benefit more in spending my money on a much better GPU?

FX 8350 (OC'd pretty significantly on air)
8GB of 1600MHz RAM, OC'd to the max the system will allow (1866)
Gigabyte 990FXA-UD3 Rev. 4
Gigabyte Geforce 750ti Windforce 2GB (doesn't draw power from just the PCI express interface like the original design)
750watt PSU