The best replacement for mbox pro is digi 003.

The best alternatives to mbox pro are rated as following:
★★★★★  digi 003
★★★★  mbox
★★★  duet 2
★★★  eleven rack
★★  apogee duet 2
★★  003
★★  apogee quartet
★★  apogee duet
★★  digi 002
★★  saffire pro 40
★  duet
  profire 2626
  rme fireface

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

Other search terms related to mbox pro and their ratings are:
★★★★★ pro tools 9
★ external preamp
You have in mind a companion for mbox pro and it is not yet here? Propose!



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mbox pro
digi 003
mbox