Still in stock at Scan. I mentally justified £300 but an extra 12% increase in price in a couple of days might need me to think about it again. I used to total system upgrade every 2-3 years but my current system has lasted about 5 years so I'm getting itching feet (technology seems to be slowing down). I don't need Skylake but I do NEED it =P
I think if I go for the I5-6600K I will just spend the next 2-5 years thinking I should have just spent a little bit money and feeling a little bit sad for myself.....
Your system is a lot newer than mine (and not on it's last legs) so it might be harder for you to upgrade.