hi, right now i have one of the first generation macbooks (white, 2ghz core duo) and i am thinking about buying the newly updated $1499 imac. i have an external 22" samsung syncmaster 226BW screen that i use to play quake 3 because of its 2ms rating. i have yet to find another screen as good as this one and I doubt the 21.5" imac screen could deliver the same performance. now i'm wondering if i would still be able to run the 2ms screen to play games on it while i have music/web/mail etc running on the imac screen. possible yes/no? thanks in advance!