Just in case. I haven't kept up with what's the best for any particular situation - maybe Rand can help there. You might have to wait for a Tiger version. In a business environment I'd want some way of poking at the disk in an emergency. Drives do eventually fail.
You might need some 3rd party CD/DVD writing software, though I think Apple added some in one of the Panther updates (or so). Check to be sure.
Otherwise, it looks like you've got everything covered unless you think you might need Mac Office too.
HTH. Luck!
Cheers,
Scott.