FX-8320 or i5-4670k

I'm looking to build a pc for gaming and light productivity work (office and the likes - no creative suite or video applications) and and looking at 2 possible builds - one with the 4670k and another with the 8320 (which from my understanding is basically a stock underclocked 8350). The intel option (using an MSI Z87M-G43) ends up being quite a lot more than the AMD (using an MSI 970A-G43). Both builds use a Radeon HD 7970, and for the AMD option I think that I would get a water cooler at some point.

The Pcpartpicker lists if interested:

Intel - http://uk.pcpartpicker.com/p/1Xr3G

AMD - http://uk.pcpartpicker.com/p/1WV9F

So my questions are

1) Will the AMD's lower per core performance be noticeable in general use, such as using the OS, or does it only affect much more CPU intensive apps.

2) Will the Z87 chipset have any features that make it a better option for a general user (with some interest in overclocking) than the much cheaper 970 board.

Thanks.

I would go with an Intel setup simply because games that are not optimized for multi-core processors will not run very well on the 8320/8350. That might change going forward with the new consoles getting multi-core processors that are similar to PC CPUs. That still doesn't change the games that have already been released though.

And if you plan on going crossfire at any point, it would be a good idea to change the motherboard you are using. The 970 chipset only supports x16 and x4 combinations, and that's on a pci-e gen. 2.0 board.

Ok thanks, I'll take that into account :)

as you have them the intel is far better, change the motherboard to a better one (m5a99fx pro is a good choice), and a nice cooler and i'd say that'd be better

http://uk.pcpartpicker.com/p/1Xu4q