The best replacement for android 2.3 is 4.0.

The best alternatives to android 2.3 are rated as following:
★★★★★  4.0
★★★★★  2.2
★★  android 4
★  android 4.0
★  ios 5
★  ios
★  symbian belle
★  windows 7.5
★  ios 4
  windows phone 7
  android 2.2
  2.3
  windows phone 7.5
  symbian anna
  2.3.4
  android gingerbread
  bada 2.0

Your alternative for android 2.3 is not listed? Suggest!
Speaking about android 2.3, one probably shouldn't forget about htc sense.

Other search terms related to android 2.3 and their ratings are:
★★★★★ htc sense
★★★★★ htc desire
You have in mind a companion for android 2.3 and it is not yet here? Propose!



Google Trends

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android 2.3
4.0
2.2