The best replacement for vox is marshall.

The best alternatives to vox are rated as following:
★★★★★  marshall
★★★★★  fender
★★★  crybaby
★★★  orange
★★★  line 6
★★  dunlop wah
★  ptt
★  crybaby wah
★  blackstar
★  fender amps
★  orange amps
★  marshall amp
★  matchless
★  cube world
  mesa
  egnater
  roland
  peavey
  dunlop
  dr z
  fender amp
  founders
  crate
  mesa boogie
  roland cube
  livejournal
  orange amp

Your alternative for vox is not listed? Suggest!
Speaking about vox, one probably shouldn't forget about throat mic.

Other search terms related to vox and their ratings are:
★★★★★ throat mic
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Google Trends

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vox
marshall
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