I just ordered the second base configuration of the 13" Retina. It seems to me to be the best value for money-option. I'm a graphic designer and web developer and i5, 256 GB SSD and 8 GB ram is probably all I'm gonna need from a notebook.
Edit: On second thought I would have loved to upgrade the ram to 16GB but there is no way I'm paying ~$270 for that. (Denmark is expensive)
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I'm looking very much forward to swap my Macbook Air 11" Mid 2011 for this machine. The retina display alone should justify the upgrade.
Just ordered the same config today and I am also swapping my MacBook Air 11" (only 2GB ram and 64gb hard drive.) Are you planning on selling your Air??