Processing help/New build

[hazza_ob]

I'm planning a new build and the price of it is waaaay over budget, i know for a fact that AMD's processor equivalents are cheaper than intel's. So my question is what is the AMD equivalent to a over-clockable quad core processor (similar to the i5 4670k) and what is a good motherboard to go with it. the CPU must have the ability to be over-clocked and the motherboard must support crossfire but SLI is optional/not really needed. My price budget it £500 and this is my current selection:

http://uk.pcpartpicker.com/p/mFssP6

 

Thanks for all your help and any other suggestions to lower the price or increase the performance of this build are greatly appreciated!

[007agentHP]

there is no i5 4670k equivalent. amd cpus are WELL behind intel. if you wnt a cheap overclockable cpu then go with the Intel Pentium g3258.