Given the incredibly low chance of getting a virus on your Mac and the incredibly high chance of anything with the word "Norton" in it doing annoying things to your Mac, I'd skip it all completely. If you someday find yourself in bad trouble, buy DiskWarrior--but that's IF you ever get in a situation where you need it.
Office--not the necessary evil most people think it is (evil yes, necessary no). If you just need to do simple word processing then TextEdit is fine. If you need to do more, Appleworks is good but a lot of people (myself included) can't get over the interface. If you need the features or compatibility with the rest of the world, then MS Office becomes a necessary evil.
Dreamweaver is great! I used GoLive for a while, and Dreamweaver is much easier, cleaner, better.
Burning in Finder has always been fine for me. If you need to make hybrid disks or multi session then you'd need something like Toast.
Do you need anything else? Depends what you do, but probably not. You'll have all the essentials built in and tweaks are easy to come by. Make friends with versiontracker.com.
