How well does it perform with an external display? I am caught between the 13" MBP and and the previous unibody 15" mbp. I don't require posts that say just get the 15". I am just trying to make a proper decision. The ONLY reason I would go the 15" route is because it would be around the same price as the high end 13" MBP. I favor the 13" MBP because of the screen real estate. I never had any trouble viewing and doing my photoshop and illustrator work on it. Thats what Spaces was for. If I was to go with the 13" MBP (I honestly believe it would perform just fine with SL and the differences would be only truly be noticed running GPU intensive programs - hardcore gaming is not considered as Apple still needs improvement in that arena to consider any notebook they offer acceptable for a standalone gaming machine. For on the go and moderate gaming it is more than great for however IMO) How would it perform with a decent sized external display? Despite what many naysayers may believe...Apple knows the 13" MBP is going to be their biggest sellers and they wouldn't have their updated OSX being a bottleneck on them - as that would hurt their overal revenue. Beyond that is up for grabs.) I appreciate the feedback in advance.