The best replacement for 70mm is 4k.

The best alternatives to 70mm are rated as following:
★★★★★  4k
★★★★★  35mm
★★★★  76mm wheels
★★★★  50mm stem
★★  105mm
★★  75mm
★★  24 105mm
★★  canon 24 70mm
★★  digital imax
★  tamron 17 50mm
★  28 70mm
★  24 70mm
★  18 200mm
★  200mm
★  65mm wheels
★  sigma 24 70mm
★  tamron 90mm
★  canon 17 85mm
★  50mm
★  77mm
  18 135mm
  17 55mm
  tamron 24-70mm
  nikon 24 70mm
  60mm telescope
  canon 24-70mm
  16-35mm
  tamron 28 75mm
  24 120mm
  ef 24 105mm
  sigma 18 200mm
  60mm
  70 200mm

Your alternative for 70mm is not listed? Suggest!
Speaking about 70mm, one probably shouldn't forget about d90.

Other search terms related to 70mm and their ratings are:
★★★★★ d90
You have in mind a companion for 70mm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of 70mm in all years. Click on graph for more.
70mm
4k
35mm