I'm going to college next year (fall 2012) and don't know what Apple product will best suit my needs. I have had a late 2008 MBP (the first generation of unibodies) throughout high school, its been a great laptop, no doubt. As its nearing 3 years old, the battery is really starting to show its age, barely can hold a charge for more than an hour and a half. My dad offered to buy me a new laptop for college...which just seems silly since this one is otherwise working great. So should I just buy a new battery for this thing and then maybe a 27" Cinema Display to use it as a desktop computer too? Or should I just get a more portable Mac, like a MacBook Air or 13" MacBook Pro? I'll be hauling the computer around campus often I'm sure, and as we all know, the 15" MacBook Pro isn't exactly light. I'm leaning towards a new battery for the MBP and an 11" MacBook Air. I'm so indecisive at this point. Thanks for your suggestions in advance.