The best replacement for i5 4570 is i7 4770.

The best alternatives to i5 4570 are rated as following:
★★★★★  i7 4770
★★★★★  fx 8350
★★★★  i5 3570k
★★★  fx 8320
★★★  fx 6300
★★★  i5 3470
★★★  i5 4440
★★  i3 4130
★  i7 3770
★  i5 3350p
★  i5 4670
★  i5 4670k
  3470
  4440

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Speaking about i5 4570, one probably shouldn't forget about gtx 760.

Other search terms related to i5 4570 and their ratings are:
★★★★★ gtx 760
★★★ gtx 660
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i5 4570
i7 4770
fx 8350