Do you have the motherboard already? If not, have a look at the Z97-Pro instead. Similarly, if you don't have the 4770K already, the 4790K is only slightly more expensive (~£10 in the UK), clocked higher, and should overclock more. Having said that, the i5-4790K is probably more than enough for just gaming.
With regard to the PSU, the EVGA SuperNova NEX G2 750W is very good, not overly expensive, and often has a rebate on it (in the US). The Seasonic G-Series, and XFX XTR Pro series are also good, and not overly expensive.