2.0 or 2.2 ghz Macbook pro?

I am looking at getting a new macbook pro and I am wondering if it is worth spending the extra money for the 2.2 ghz processor? I'll be using it for work primarily with audio/video material, using software such as Adobe Premiere pro and Audition along with Sony Acid pro and various VST plugins. I don't mind waiting a little while longer for things such as renders but I want to know if the extra 0.2 ghz will make a noticeable difference during the regular work flow.