Debating between a 2011 Air or Pro. Both are available on Craigslist at the moment...the Pro is a bit more but I think I could talk the seller down. As of right now I use my '08 Macbook for mostly web surfing, iTunes, day to day stuff and the occasional Logic Pro session. When I record with my band I use a lot of tracks, but when I'm just messing around it's down to 3-5 tracks of both analog sources and soft synths. Any advice would be great!