Best, or at least suggestions on, audio settings for clean sound?

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I am using a Juicedlink pre-amp with my 5D Mk2 and don't have a great deal of experience in the audio realm and would really appreciate some suggestions on settings. I currently have the analog gain (in ML) at 29 and both L & R digital gains at 0.  My meters are flashing green and peaking about halfway across the screen.  The sound I'm getting is pretty clean but on the quiet side.  Per instructions from JuicedLInk I have the audio settings in the Canon menu set to manual with the gain there set to one click up from zero.  This ensures that all the control/amplification is being handled by the JuicedLInk.  Again, any input (pardon the pun) would be great!