Ok guys, I've recently moved down to a 13" mbp from a 17" mbp but I'm starting to notice that later in the future (I already know myself) that I will be dying for screen real estate. The 13" size is freaking awesome and all but at times I feel as if its kind of TOO small. I think a 15" would be perfect (and I do miss a dedicated GPU) as when I have my 13" connected to my 24" LED ACD the animation from spaces and everything is slow compared to using a 9600m gt card. I guess it fudges up my workflow and experience with SL. I guess I would break even if I went to the 15" but the reason I went with the 13" is due to the size (but now starting to think its TOO small) and to put extra $$ in my pocket. One main reason that I'm hesitant on exchanging the 13" mbp (even with the restock fee) is due to the fact that the 15" and 17" mbp has not yet received an update with the quad core chip. I guess my logic is, I would rather have spent the $1500 on my 2.53GHz mbp and keep the extra $$ instead of breaking even with an outdated 15" specs. But another side of my reasoning is that "who cares about the i5/i7 updates on the mbp as long as the 15" has a bigger screen and faster GPU (to be used with my 24" ACD) than my current 13". Ok guys, so I have a week left until I can exchange my 13" for a 15" but what would you guys do in my shoes? I'd appreciate your opinions.