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I just did the upgrade you are contemplating from a 15 inch Macbook pro to a 13 inch Macbook Air. I went for the 2.2 Gig I7 with 256 Gig SSD. I am really enjoying the Air it is so much easier to carry around and i see it replacing my ipad as well. My only complaint is that I touch type and finding it a little difficult to get use to the keyboard. The left shift key is giving me a problem i keep hitting the ` instead.
 
The more I look at it, the more I'm liking the 13" rMBP. I'm really thinking about getting this machine this weekend, especially since I plan on selling my MBP and using that towards my purchase. Granted it won't be much, but it'd be even less when the new macs come out. The rMBP is already crazy thin, and I don't know how I'd feel if a redesign took away all of the ports and added USB-C. What do you guys think?

Edit, my configurations don't save when you click on the link. Bummer. Would get the middle option w/ 16 GB of ram, and 2.9 GHz
 
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