You're misinformed and/or looking at older models. As I pointed out to another response, I'm talking about the 420s model, not the 420. The 420s is substantia

You're misinformed and/or looking at older models. As I pointed out to another response, I'm talking about the 420s model, not the 420. The 420s is substantially slimmer, and mine has an i7. I believe the 420s does max out at 8GB, but it's a year old at this point; the replacement 430s does accomodate up to 16GB. There is a 15" model of the series 9. It's a full pound lighter than the retina mbp. I strongly suspect it can be ordered with the same i7 you can get on the mpb, but I don't remember off the top of my head. No idea what you're talking about with the Vaio Z. This is the one I'm talking about: 2.6 pounds, 0.66" thick. Yes, this one actually is a 13" machine, but before you go setting up a straw man remember that my point was about thin-and-light engineering, not about 15" laptops. http://www.engadget.com/2012/06/04/sony-vaio-z-series-ivy-bridge-refresh/ http://www.engadget.com/2012/06/04/sony-vaio-z-series-ivy-br...