Recently I bought after a lot of thinking the MBA 13" 2.13 4GB 256ssd, I use it one the campus and at home I connect it with the 24"ACD. For my use normal tasks plus some video editing and making presentations the MBA is still perfect. However, with the laucnh of the new MBPs I somehow attracted to the new quad cores especially the 2.0 highress antiglare. Now I put it on craigslist and somebody is willing to pay enough so with just and extra $100 and some educational discount it's possible to buy the new MBP. One of the extra advantages is the better resale value. What is the best thing to do?