I bought then instantly sold a base 11", it wasn't fast enough, the screen was too small, etc. I had tried to kid myself and say I'd do all my work on the desktop..wont. I'm currently using a 2.4/4/256 pre unibody mbp. It works fine for photography work, not too slow, but it's big. Obviously running filters can occasionally slow things down. I cAn't think the 13/4/256 would be any worse speed wise. The idea was to replace my iPad and MacBook pro, but I'm not sure that will go. On the flip side, keep the iPad, get a 15 with higher res or a 17"... Here's my issue. I manage with lightroom (let's not have an aperture debate ) and there's really no effective way I ccan see to share the libraries. I could point multiple machines to image stores on my nas and try to find some solution for catalog sync only, but from what I've read that's hit or miss. Since I know there are other photographers on the board here, I thought I'd ask how you integrated the air, what you do for space, generally see if perhaps you have found a workflow I've missed. Obviously I could just go camera raw, store on the nas, but I genuinely enjoy using lightroom.