If you plan to overclock at all i would go with the 4770k. Its a awesome chip.
I had the same dilemma over 2 years ago 2500k or 2600k......I went with the 2600k and i hope to get 2-3 good more years out of my beloved 2600k. I am glad i spent the extra $ on the better chip. Since it is a long term investment.
My 2 i3 2120 based HTPC's will be around for years also. The i3 2120 series chips have plenty of HP to live on for years.
2600k@4745mhz CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LGUM95 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system