I made the transition to Google Apps and GMail

I converted my growtechinc.com emails over to Google Apps / Gmail.  I absolutely LOVE it!  Gmail is awesome, with so many cool features, like the ability to "tag" emails with MULTIPLE labels!  Think of it as the ability to put 1 email in several folders for easy retrieval later on.  Plus it's FREE!

I also created an "archive" email account and am using the "Google Email Uploader" to upload everything I had in Outlook to this new email account.  That way it's accessible, but "out of the way."

To transition your domain to your apps email simply change the MX records in your DNS to point to googles server.  If you want to use a subdomain, such as mail.growtechinc.com, you have to make an A record change in the DNS as well.  It's nicely documented on the Google site.

I'm absolutely loving Google right now!