I'm trying to decide on a laptop. I already have a Mac Pro 5.1 which is my main machine, but I need something portable for photography use when away from home (mainly dumping memory card contents, simple organizing using Adobe Bridge/Lightroom and the occasional Photoshop editing). I do have a Powerbook G4 (1.67GHz), but I find it almost useless now because it's so slow for everything. An 11" or 13" Macbook Air looks tempting because of its small size and weight. I also plan to use the laptop as a DAW (Digital Audio Workstation) using Logic Pro, Cubase, Pro Tools or whatever (haven't decided yet) as my music gear is in a different place than my Mac Pro. Making music is a hobby, so I'll settle for something "good enough" rather than "the very best (and most expensive) you can get". Here I assume the Macbook Air would be too limiting with its small screen and I'm not sure how powerful I would need the computer to be. I don't want to spend too much money on this, and an older second-hand laptop would probably suffice. I find my Powerbook G4 quite heavy, so something lighter would be nice, but I definitely need more power than I'm used to with my Powerbook G4. Aren't Macbook Pros still quite heavy? Then there's expandibility -I don't like how newer Macs can't be upgraded (replace HDD with SDD, upgrade memory), so a 2-3 year old computer might be the way to go which will also save me some cash I think.