I have purchased a late 2011 13" MBP for $950...I have an opportunity to buy a mid-2010 15" MBP for $1100. My 13" can still be returned to Best Buy for a refund. The 15" is model # MC371LL/A, 2.4 i5, 4 GB of RAM, 320 GB HD. You know the specs of the latest, current 13" MBP. With that knowledge, which is the better deal? I do a lot of photo editing in Lightroom, PS5 and Aperture...also, I would like to be able to edit HD video. Please offer some sound advice. I'm a little new to this, so please go easy on me if I'm asking questions that have already been asked.