vulcan78 :
Obsolete.
Ice Lake is due out mid-to-late 2018, and will be 10nm, I would probably wait for that if you can.
Wait until "mid-to-late 2018", meaning actual mainstream availability and the v1.1 bug fixes early 2019?
For a minimal boost?
Why wait?
If the OP had a current viable PC of a gen or two old, then yes....wait.
If he's building new? Waiting over a year? Why?
OP....buy what you want, when it is available, at a price you want to pay.
Waiting for 'the next best thing' is a fools game, unless the 'wait' is less than 90 days.