The best replacement for f100 is f5.

The best alternatives to f100 are rated as following:
★★★★★  f5
★★★  f6
★★  f4
★★  canon eos 3
★  c10
★  n80
★  n90s
★  f110
★  f80
★  eos 3
  nikon f6
  nikon f5
  mig 19
  nikon n80
  f5 nikon
  f50

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Speaking about f100, one probably shouldn't forget about crown vic front end.

Other search terms related to f100 and their ratings are:
★★★★★ crown vic front end
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