Yeah, I hate when people rob me of two inches...
I just don't like how on some 17" MBPs, the display wobbles a bit when I type on it. I assume it's a product of the size of the display. For that reason I would get the 15"
Diablo 3 will run on a new MBP, but you'll be really disappointed. A gaming PC is far better. Make no mistake, the new Macs are great, but gaming rigs they're not. Not even closeThe 17in MBP is really not too bad but I do own a Alienware M17x as my desktop replacement in my room. Now that 17in notebook is a huge black beast LOL. That's why I just bought a 15" MacBook Pro to still have some good power but more portable for my needs at work, school, and travel. I would have gotten a MacBook Pro 13" but I didn't think it would provide me the graphic output I would want for Diablo 3 when it is released.