The best replacement for 70-300mm is 70-200mm.

The best alternatives to 70-300mm are rated as following:
★★★★★  70-200mm
★★★★★  55-300mm
★★★★  55-250mm
★★★  55-200mm
★★  75-300mm
★★  nikon 70-300mm
★★  55-200mm nikon
★★  100-400mm
★★  18-55mm
★  nikkor 55-300mm
★  18-200mm
★  100-400mm canon
★  canon 55-250mm
★  tamron 70-300mm
★  nikon 18-200mm
  canon 70-300mm
  50-200mm
  nikon 55-200mm
  tamron
  canon 75-300mm

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Speaking about 70-300mm, one probably shouldn't forget about d5100.

Other search terms related to 70-300mm and their ratings are:
★★★★★ d5100
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70-300mm
70-200mm
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