I currently have a MacBook 2.26 that was purchased about six months ago, right before the new models came out. I'm considering upgrading to a MacBook Pro 2.66 13". I prefer the aluminum enclosure, backlit keyboard and slightly thinner and smaller size. But this alone probably isn't enough to justify the upgrade. Will I see much of a performance gain with the MBP? I have a Mac Pro I use as my main computer, and the laptop is just for web, email, word processing, etc. How significant is the battery difference? That's another reason the MBP appeals to me. A 10-hour battery would be pretty incredible. Another option is the 2.4 13". But that seems even closer to what I already have, and maybe not worth the upgrade. Any thoughts?