DiarrheaTouchdown :
Isokolon :
it pretty much depends on your monitor.
@1080p yes, the 6600k will make a difference
@1440p not necessarily
however the 6600k is the better CPU and a cooler like that on a 6500 is kind of...big big overkill.
seeing as you already got the cooler, it's really more a matter of if you can afford the extra cash for especially the board.
Thanks man, would you perhaps recommend a good z170 board?, I have little knowledge of it as I was not interested of oc'ing
depends on your location
I'd get one of these:
Gigabyte Z170(x): UD3 / Gaming 3 / Gaming K3 / Designare
Asus Z170: -A / Pro Gaming / Pro / Maximus VIII
AsRock Z170: Fatal1ty K4 / K6
MSI Z170: Gaming Pro / Gaming Pro Carbon / Krait Gaming / M5
basically the cheaper ones aren't really anything I'd recommend. yes they'll will work, but if I'm spending 110$ on a crap board or 130$ on a good one....you get what I mean...
the more expensive ones are hardly worth the money, especially when you don't really know much about mainboards and overclocking
my personal sweetspot is usually the Gigabyte Gaming K3 -- when you get it cheap. sometimes this board is ~120 or the UD3 / Asus Pro as they come with great features and quality in their price range.
Many people despise AsRock, but the Fatali1ty K4 got great professional reviews and is a very nice option.