I have a Mid-2009 17" MBP with 8GB of RAM in it, and one of the Seagate Momentus XT drives in it. Since I'm already accustomed to the weight, and carrying a bo

I have a Mid-2009 17" MBP with 8GB of RAM in it, and one of the Seagate Momentus XT drives in it. Since I'm already accustomed to the weight, and carrying a book or too with me all the time, or my iPad... weight argument is moot. I'd get more benefit, and it'd be cheaper... to just upgrade my current setup with a 512GB SSD, rather than going with a current model Air. (because I wouldn't be buying anything but a fully-loaded top model) It's too wimpy with the stock setup, imo.