Well since you got the Macbook Pro, I'll assume you do some professional quality media work, film, photography, or music. So if you do pro photo work then get Aperture, Apple's totally sweet photo library, raw editting and nondestructive editting app. If you do video editting get Final Cut Pro, or if it's more of a hobby get Final Cut Express. I've never used Logic or Logic Express, but it's Apple's music making app, so I can't recommend it.
What sort of work are you going to do on your Pro machine?