rMBP Processor Question

As a sort of follow-up to my last post (http://www.theverge.com/2014/6/22/5833488/college-student-laptop-purchase), I've decided that I'm going to get the current build of rMBP with whatever student incentive they offer for back-to-school, unless they refresh the hardware within the next few weeks. That leaves me to decide whether I should get the 2.3 GHz or the 2.6 GHz processor in my Mac. I'm going to be a computer science student, but I don't know if the difference between the two will be noticeable, even when trying to future-proof my device. I think I'm pretty set on the 512 SSD ($450 to bump it to 1 TB, when there are other options, seems hefty), but for $180, I can't decide if the processor upgrade is worth it.