I'm thinking about a mac mini but rather have a macbook as I can bump up the hdd and especially 4gb of RAM. If I were to use the macbook's screen as the extended mode would it be fine to run both the 23" ACD and the macbook's screen at native resolutions without any problems/slowdowns? The macbooks are a great deal in performance/$$$ and since I dont play games I'm thinking about using the macbook synced with my 23" ACD as a desktop. How fast would everything run in dual monitor mode?? Will it run on par as say a 15" or 17" mbp (gpu aside), Overall speed of leopard?