The best replacement for z100 is z95.

The best alternatives to z100 are rated as following:
★★★★★  z95
★★★★★  ax1
★★★★  trek 1.1
★★★★  trek 1.2
★★★★  felt f95
★★★  giant defy 3
★★★  z200
★★★  pmw-200
★  z250
★  92.3
★  f95
  sony fdr-ax1
  ex z200

Your alternative for z100 is not listed? Suggest!
Speaking about z100, one probably shouldn't forget about elvis duran.

Other search terms related to z100 and their ratings are:
★★★★★ elvis duran
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z100
z95
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