If you cant afford the Intel X-Series, the next generation of Intel mainstream processors will be dropping this year. Coffee Lake looks quite impressive with 6 cores and 12 threads on the i7.
These puppies run on the Z370 chipset and will require a motherboard upgrade to use.
Not much to say until these actually drop and the benchmarks are in; however, I have a feeling they will be quite impressive compared to the previous generation. You can see the full specs of the flagship i7-8700K here:
You can read more about this lineup here: