Migration Assistant: Easy way to filter out junk?

I'm in the process of finally buying a new computer. This will the my first computer where I can take advantage of the ability to use the Migration Assistant. That said, my current computer is 6 years old, and while I occassionally clear out the Library of preferences and application support files for apps I no longer use, I'd like to port my information over with the least amount of excess junk.

Does the migration assistant offer any filter as far as only porting over preferences/support files for specific apps?

If not, what's the safest/easiest way to get all my data over to the new computer (as far as Mail, iCal, Address Book, iLife and iWork apps go; I'm getting CS3.3 at the same time as the new computer, so no need to transfer the older CS prefs/support over)?

Thanks in advance for any suggestions!