I've lived in several of these cities briefly (Seattle, Austin), and a long-term (Raleigh, NYC).
If you can put up with the car culture - which you have to if you want to live outside of NYC or Chicago - Raleigh is a great city. Very low cost of living, a burgeoning downtown night-life and cultural scene, and very warm, likable people. Austin has a much better downtown, but I'd be concerned about traffic moving there, which is not a problem (yet) for Raleigh.
If you can put up with the car culture - which you have to if you want to live outside of NYC or Chicago - Raleigh is a great city. Very low cost of living, a burgeoning downtown night-life and cultural scene, and very warm, likable people. Austin has a much better downtown, but I'd be concerned about traffic moving there, which is not a problem (yet) for Raleigh.