the Kaveri APU series has much better single threaded performance and the iGPU in them is vastly superior to that found in even a haswell intel.
For the cost it is hard to beat.
With that said the capability of an i3 is hard to discount. The i5 isnt really worth the extra cost - performance difference over a identically clocked i3. i7 is of course performance king.
The a10 7850k offers some decent capability and should easily overclock into the 4ghz range with a $20ish aftermarket cooler.
The FX series has some fairly appalling single core performance and WOT is not well threaded so the advantage of the core count is not useful in WOT.
the Kaveri APU (a10 7850k) would look quite a bit better on that WOT performance chart
If you check the other benchmark results at gamegpu.ru (where that bench pic is from) you will see that it is a far more diverse situation than Intel & Nvidia > AMD & AMD
First figure your budget - if it is unlimited then go with an i7 devils canyon - otherwise consider your needs and find something that fits them.
At the lower end AMD is unbeatable $ for $
In the mid range AMD has only an end of life product (the AM3+ platform) but with that said intel never keeps a platform nearly that long anyway. So it is really down to buying a current gen intel i3 (4 threads), intel i5 (4 threads still but 4 cores - not really an amazing deal over an i3 unless you overclock), or a 6 or 8 core (6 or 8 threads) FX series AMD.
Clock for clock the FX will lose to the intel. Dollar for dollar the i3 is probably best unless you play highly threaded content - then the AMD will win out dollar for dollar.
If you are in the higher end frame of mind there is nowhere but intel to look right now.
On the GPU side there is no point in the nvidia vs amd arguments - they both have games that work better for them. The $/performance levels between them are almost identical so it really just comes down to which you personally prefer or which games are bundled - that said AMD is about to get started on a one year advantage in technology over nvidia (probably an odd feeling for amd after the huge tech gap between them and intel on CPU design due to the bulldozer core being a poor choice) due to their technical role in developing new memory technology.
Dont be swayed by blind fanboys - get what works best for you within your budget and dont get anything that runs less than 4 threads.