Like HangTime suggested, folks like me will be reading these threads after the fact. I stumbled across a mention of Ozone in a few other GB threads and have been researching it for the past couple of days. I downloaded a great Ozone 4 tutorial PDF. You may already have it, but here is the link:
http://www.izotope.com/products/audio/ozone/OzoneMasteringGuide.PDF
I've been recording my own music for the past few years. Started with ProTools but for the past year it's been exclusively GB. I've gotten pretty good at arranging, recording, and mixing my songs, but they still lacked that "radio quality". That's when I realized that I was still missing a big part of the equation... mastering. I have done a ton of reading on the topic, so I'm fairly familiar with the concepts and what is involved, but I have yet to get my feet wet. I've been searching for a decent mastering plug-in that will work well in GB and it seems like Ozone 4 might fit the bill.
If anyone uses Ozone 4, especially in GB, please let me know what you think. Thanks.