The best replacement for fx1 is fx7.

The best alternatives to fx1 are rated as following:
★★★★★  fx7
★★★  z1u
★★★  z1
★★  fx1000
★★  superjet
★  hvx200
★  xl2
★  hdr fx7
★  canon xl2
★  fs1
★  canon xh a1
★  canon xha1
★  hvr z1u
★  fx1e
  xh a1
  dvx100a
  hdr fx1000
  hvr z1
  hdr-fx7
  pd170
  sony fx7
  hc1
  vx2100

Your alternative for fx1 is not listed? Suggest!
Speaking about fx1, one probably shouldn't forget about mk2.

Other search terms related to fx1 and their ratings are:
★★★★★ mk2
You have in mind a companion for fx1 and it is not yet here? Propose!



Google Trends

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fx1
fx7
z1u