Been using the 13 i5/8/256 for a few days, and also installed Bootcamp and Win7 Ultimate. Have 3 partitions: main, test, and Bootcamp. Test is for trying OS X 10.9 and other beta releases.
No regrets.
Didn't go for the i7, since didn't expect any real advantage over everyday use. Went with the 8GB RAM since MBA is not user upgradeable. Thought 256GB SSD was enough since this is not primary laptop for now, and have a Seagate Wireless for media if I need it. Home network has new TC for backups.
Wife likes it, though she wanted me to get the 11 because it is "cuter".
Initially had slow wake from sleep with the menu bar not appearing right away. Problem seems to have cleared up all by itself, so wak is just a few seconds.
Will be installing a few Adobe CC apps.
Could not try the new Apple cloud apps as my developer ID has a space in it.