I know it has this aluminum casing and all but will it be durable? Right now i have a MB that's just falling apart, trackpad is oversensitive, superdrive doesn't work, casing is cracked on all sides... poor thing didn't survive backpacking... and i'm really seeing the MPA as the solution to my problems. I hear the complaints, no optical drive, one usb, no firewire... but I've been living without an optical drive for almost 8 months and i only ever use the usb port for my ipod (and besides, i have a multi usb hub thing that i needed for my old pc), no firewire... well, i can always use my computer at work if i ever need to use one... I don't need those features... i just need a computer that's durable and light... but the last thing i want to do is shell out that money for a MPA and it just fall apart like my MB did when i can just buy another MB... I don't want a MBP... too big for me... but if the mpa is more durable than a MB ... i'm sold. Does any one know? I've been to the apple store but I didn't get many answers there (too busy that day i guess)... so i'd like to know your thoughts.