How can I move my iTunes media to a new system?

My old Vista PC now does everything at a snails pace. It's painful and infuriating to watch it slowly perform the simplest tasks. Reformat time! The only problem is...my iTunes account is married to that drive. And all the media took 36 hours to convert to iTunes. Is there a simple way to just move it or am I going to have to forfeit next weekend to be with my PC?