The Proposal gets them out of a 25 year hiatus!? My thoughts exactly Aznb0y.
I would say just go for the straight forward approach. Since we're post May 15th, they know you hold an acceptance at UNC. I would say something to the extent of, "I have a large interest in aesom, I left my interview excited about that prospect of studying here...yada yada yada. As my situation stands now, I have a generous financial offer from UNC that equates to a substantial difference in te COA between your two school. Without further financial assistance, I cannot forsee myself turning down UNC" Of course you'll have to charm them a little bit, make them want you so back that they throw the maximum amount of fin aid at you.
Funny thing is, I had a dream about our Austin trip and in it I was only referred to as Swarley.
Also, Drizzt if you're out there I can no longer have you're updates on my fb home due to today's (or was it last night?) posting.
Lastly, morning everyone!