[Dovecot] Server & move to Dovecot

[K Gilpin]

Hi,

I a currently running a server which is using uw-imap server which currently
has 190 users.  I am looking to move the server OS and the imap server to
Dovecot Imap Server.  We are currently using mbox as the default mail file.
I have a couple of questions to ask.

1) Would it be better if we moved to maildirs during the server move?
2) All current mail files are in a directly called
/export/home/mail/%username.  How would one configure dovecot to use the
above path?

How points to any good FAQs would be great.

Thanks

Kevin