The best replacement for canon 70d is 6d.

The best alternatives to canon 70d are rated as following:
★★★★★  6d
★★★★  nikon d7100
★★★  nikon d5200
★★★  nikon d5300
★★  nikon d7000
★★  t5i
★★  sony a77
★  canon t5i
★  700d
★  sony a7
★  nikon d7100 image quality
★  panasonic gh3
★  canon 6d
  canon 7d
  nikon 7100
  nikon d610
  pentax k3
  canon 60d
  nikon d3200
  sony rx10

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Speaking about canon 70d, one probably shouldn't forget about sigma 18-35.

Other search terms related to canon 70d and their ratings are:
★★★★★ sigma 18-35
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canon 70d
6d
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