I do music production. I have a 2010 13" MBP. I love the footprint. I also use it for everyday stuff in addition to music in Pro Tools and Studio One. I want a little more horsepower (a substantial bit more) for tracking heavy sessions. I can put about a grand into this move, give or take a bit. Option A is keep my 13", (which I've already upgraded with 8gb ram and a 500gb hd. Also have AppleCare for it), and add a base model iMac to my studio. the Pro's I can think of is I get to keep my 13" that I like a lot and get some extra juice for Workin in the studio. And I can still mix mobiley on the 13". Also the base i3 even outperforms the 15" i7 2.6 in geekbench scores. Option B is sell the 13", and get a 15" with the grand I've got put away plus the money I get for the 13". Downside is I have to unload my 13", losing my investment in upgrades, plus I really like it. Also it's my first Mac and although I don't usually get sentimental about electronics, I'm really attached to it. Lol. The upside to this is I'm keeping life simpler by just using one computer instead of two. Meaning, now it's two computers to backup, two to keep updated, and so on. I def need a laptop around, because i like to mix on the go. What scenario makes the most sense to y'all?