I am about to order a new 13 inch macbook pro. I am wondering if the difference will be noticeable between the Apple (MB990LL/A) 13.3 in. Mac Notebook to Apple (MB991LL/A) 13.3 in. Mac Notebook. I know one is 2.26ghz v 2.53ghz, and the MB991LL/A has a larger hard drive and memory, but will all those things be really noticeable? I am a college student and do not use the computer for much less besides the web, to do papers, and to watch shows/ tv.