I got my base level 13.3 Unibody Macbook with 4GB RAM around March/April this year. I recently have become interested in and taking classes in object oriented programming, AutoCAD (possibly Vector Works in the Spring) and audio recording/production. The 13.3 inch screen isn't cutting it for me real-estate wise, but I need something I can take with me to the studio in which most of the equipment connects via Firewire 800. I'm looking at this one: http://store.apple.com/us/product/FB470?mco=MTA4MzEzMjI; and I can live with my MacBook one for a while (really won't be at a disadvantage until next year). So I'm guess what I'm wondering is... should I wait until a possible Spring/Summer refresh and invest then or go for the cheapest 15 incher now? Thanks, all!