FWIW, when I was in the Apple Store yesterday, I specifically asked if there was a 15" version of a non-pro MacBook and I was told such a thing didn't exist. I was told they only come at 13.5". Have you seen otherwise?

And yes, I need to figure out how much hard drive and RAM I can afford, given that I want to get more serious with my photography. I'll need storage and processing power for Photoshop and the work that will go with it.