The best replacement for logic 9 is pro tools 9.

The best alternatives to logic 9 are rated as following:
★★★★★  pro tools 9
★★★★  logic x
★★★  pro tools 10
★★★  logic 8
★★  cubase 6
★★  cubase 7
★★  cubase 5
★★  pro tools
★  reason 6
★  pro tools 8
★  sonar x1
★  ableton live 8
★  studio one 2
★  cubase
★  digital performer
★  ableton 8
  reason 5
  cubase 6.5
  protools
  garageband 11
  studio one
  dp 8
  nuendo

Your alternative for logic 9 is not listed? Suggest!
Speaking about logic 9, one probably shouldn't forget about mavericks.

Other search terms related to logic 9 and their ratings are:
★★★★★ mavericks
★ mpc 2000xl
★ maschine
You have in mind a companion for logic 9 and it is not yet here? Propose!



Google Trends

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logic 9
pro tools 9
logic x