Exchange 2007 Journaling

Hello,

This may be a novice issue, but I'm having some issues in determining whether to use Standard or Premium Journaling in Exchange 2007 for Postini Message Discovery. I only have about 20 user mailboxes I am trying to archive. I've tried to use Premium thus far, but have ran into issues and I think much of it is based on the instructions from Postini. A couple of questions:

1. For my size of an organization, would it be better to use Standard Journaling or are there far more benefits using Premium? All I really want to do is avoid using PST files and have incoming and outgoing emails archived with Postini.

2. If I use Standard Journaling, will I still need to have a separate mailbox database for the journal account? With Standard Journaling, all I need to do is select the journal account in the mailbox database journal recipient field?

3. What's the best mailbox policy size for mailboxes once the archiving is in place?

Any other advice would be helpful.