Looks like I'm changing my answer.
I voted for a 15" AG + SSD but I realized something. It was all too stressful to finally come to this decision. I'M RUSHING MYSELF. I have buyer's remorse before I've even bought anything. I'll keep using my early '11 MBP until next year. Hopefully the lineup is a bit more impressive.
I'm not willing to make so much compromise. The legacy and Retina each have features I would love to have. The lineup is cramped. I know this is supposed to give me options, but there are features lacking in all the options. And so my best option is to wait and be happy with what I have.
I will upgrade my 13" with 16GB RAM and SSD soon. Looking forward to a thunderbolt display refresh as well. I like the prospect of using it as a dock for firewire, ethernet, USB, and power. Hopefully they revert back to matte displays or else it still won't even be an option. Even this new reduced glare gloss would be acceptable. With the rise of USB3, it's clearly coming.