The best replacement for w8 is w9.

The best alternatives to w8 are rated as following:
★★★★★  w9
★★★  w7
★★  x8
★★  w8.1
★★  w9 form
★★  w9 sony
★  w8 pro
★  w7 performance
★  w6
★  live with walkman
  x10 mini
  xperia x8
  w9 forms
  w4
  samsung galaxy y
  xperia mini

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Speaking about w8, one probably shouldn't forget about w7.

Other search terms related to w8 and their ratings are:
★★★★★ w7
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