4670k overclocked (4.2ghz) vs 4770 (3.5ghz) standard?

[loslyfgmail]

i have a choice of two pre-built systems (fixed specification) - they're identical with each having the following:
- 250GB SSD
- EVGA GTX 760
- 2TB Hard Drive
- 16GB DDR3 (1600) RAM

differences
system 1
- Asus B85M-G
- Coolermaster K-350 Case
- Corsair 550W PSU
- i7 4770 and standard cooler
- £1040

system 2
- Asus Z87-K
- Corsair Carbide Series 200R
- Corsair 600W PSU
- i5 4670K (overclocked to 4.2ghz)
- Arctic Cooling Freezer 7 Pro v2
- £1080

predominantly i'll use the pc for gaming, which is the one you'd pick and why?
also, is a 550W PSU enough for system 1 (given it's got an SSD & Hard drive, i7, and GTX760)?

they're both from www.scan.co.uk/value-systems

 

[TeodoI7]

If you are going to be gaming go for the 4670K because its faster in games and will give you better frame rates.

 

[Deemo13]

I have to make the obligatory statement of "built it yourself" because its much more fun and quite a bit easier.

The i5 would have an advantage because it is clocked higher. The i7 gives no advantage in games.

 

[AxlFone]

I7 it gives you better performance in future. And you can OC the 4770k easy..
Look this http://extremespec.net/gigabyte-ga-b85-hd3-motherboard-review-design-testing-performance/3/
Cheap mobo deset OC Same thing with this 760
http://extremespec.net/zotac-geforce-gtx-760-review-design-testing-performance/3/
Look this too http://www.techpowerup.com/reviews/Intel/Core_i5_4670K_and_i7_4770K_Comparison/
Now you can get both. How it sound to get I7 for a price I5 then just buy intel xeon 1230V2 or 1230V3
That is best bang for your money.
http://www.cpubenchmark.net/cpu.php?cpu=Intel+Xeon+E3-1230+V2+%40+3.30GHz
http://www.youtube.com/watch?v=OcB1BIyJ5j8