I had a look at the i5 2500k CPU which got some raving reviews and has got me quite interested.
I think the only place where I really get lost is motherboards. There are so many different makes and what not I really don't know where to go. What's the difference between the one you linked, R700 odd and a R2000 mobo?
What do I need to go with to best suit my gaming rig?
This link should provide some insight into the different intel chip motherboards, I don't know anthing about AMD chip motherboards except apperently they have far far superior onboard graphics but since you will be using a dedicated card I don't think it matters anyway.
Link: http://www.pugetsystems.com/blog/2011/06/09/h67-p67-and-z68-which-one-is-right-for-you/