i've never had to buy this seperately, but can i buy ANY kind of monitor? i was thinking about this one http://www.bestbuy.com/site/olspage...=product&tab=2&id=1170290375913#productdetail plus, i was gonna install leopard on it. good idea or not? i've been hearing mixed reviews on leopard on older macs. some people tell me i should just get tiger. its running panther right now.