The best replacement for i7 4770k is 3770k.

The best alternatives to i7 4770k are rated as following:
★★★★★  3770k
★★★★★  i5 4670k
★★★★  i7 4820k
★★★  i7 4930k
★★★  i7 4770
★★★  fx 8350
★★  fx 9590
★★  4771
★★  i5 3570k
★★  i7 2600k
★  i7 4960x
★  i7 3770k
★  i5 2500k
★  i7 3930k
★  xeon e5
★  fx 9370
★  4770
  i7 4771
  4820k
  a10 7850k
  a10 6800k
  3930k

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Speaking about i7 4770k, one probably shouldn't forget about gtx 780 ti.

Other search terms related to i7 4770k and their ratings are:
★★★★★ gtx 780 ti
★★★★ gtx 770
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Google Trends

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i7 4770k
3770k
i5 4670k