[c_t_montgomery]

What will you be doing? Unless you're spending your day in a heavy application (i.e. Photoshop, XCode, Eclipse), I'd say the Air, hands-down. I'm on my third one and am hoping to never get another brand of laptop - I love it. You just can't beat the size.

It has to hustle to keep Photoshop or XCode open longer than an hour or so, though.

[guybowden]

Mostly web dev stuff. A Vagrant vm Ubuntu box running all day and Sublime Text. Then the usual Mail, Chrome, Spotify etc. Photoshop occasionally.

I'm 100% sure the Air will cope with my day to day and not have any lag etc. But since it's only an extra €100 to get the Pro I'm not adverse to paying the extra for those times without a monitor, I just don't want any downsides because of that!