If you actually think you might overclock later you should get those parts now. But I wouldn't worry about it much, you'll probably be so happy with the performance of your new system, you won't ever bother to overclock it.
(For example, I used to get OC friendly parts for many years, but after never actually OC'ing in the past 7 years or so, I've finally given up even buying the required parts. However, I do have an i5-3570K, because it was the fastest at the time, and I do use a CM Hyper TX3 because it's very quiet.)
Edited by Quaker, 04 October 2014 - 03:02 PM.