if you wont be upgrading anytime soon, its better worth to switch to intel / zem
the most powerful fx, the 9590 cant match the modern i5s,
so, when in the future you'll need the horsepower of an i5/i7, youll have to switch
all the money you spent upgrading your fx 6300 to other fx's would be wasted
in summary: on the whole, you'll save money by switching to intel / zen now