Going from a 1600 to a 2600X? Might be much less expensive (i.e., free) to at least try OCing your current CPU to as close to 3.9-4.0 GHz as possible....they really are not *that* far apart in performance... (In your shoes, if upgrading at all, it'd be to a 2700X...more cores, nice cooler!)
Cheers whichever way you decide to proceed, however!