I would get an R9 280X over a GTX770.
What are the other forums you asked on?? I post on quite a few myself.
Edit!!
Standard 1600MHZ or 1866MHZ DDR3 is more than enough too,as you are using a discrete card.
The M500 240GB is cheaper and a MLC drive.
A Seasonic G 650W or one of the XFX PSUs,is what I would get.
The motherboard is probably OTT TBH - most of the motherboard functionality is in the CPU with Haswell including part of the voltage regulation.
Haswell like IB is more CPU dependent with regards to overclocking and cooling is usually more the limiting factor than the motherboard.
These motherboards seems to overclock well:
http://www.kitguru.net/components/mo...dget-friendly/
http://www.eteknix.com/asus-z87-c-z8...ard-review/13/
Both motherboards are under £100. TBH,any of the decent £80 to £100 should be fine.