So I have a 3 year old white MacBook, that has served me well and I love. However, the new 11" MacBook air looks amazing and I'm very tempted to get it. The thing is, I do use my MacBook for some work, mostly InDesign. I was wondering how much performance I'll really lose? I know the MacBook air 1.6 is 400mhz slower, but on the other hand the hard drive will compensate for some of the loss. Also, I might gain some performance by getting it with 4gb ram vs my current 2gb. I was just wondering, for design work like InDesign and Photoshop, how big will the performance difference be? Will I get roughly the same, thanks to the faster HDD and more ram, or will it be noticeably slower. The performance of my current MacBook is good enough to be productive, but if it were much slower then it'd start to get tedious. Any advice?