I'll be new to mac as soon as i buy this laptop. Two things i'm trying to decide between are size and processor. Size: I've always been on 15inch laptops and although i'm not against a 13 inch one, i'm just not used to it. I like the added portability but my question is is it that big of a difference in screen size to be noticable in day to day stuff? Has anybody gone from 15 to 13 and gotten use to the smaller screen? I'll be going to the store later to try it out, but i'm afraid being in this huge store (best buy) won't give me a good idea on size. My 46inch tv looks big at home and tiny at best buy processor: i'm not gonna be doing anything crazy. Web browsing, watching hd videos on youtube and maybe a little video editing here and there. Would the corei5 be good enough for me?