Ok so I got a brand new quad core 3.2 GHz Mac Pro. It's equipped with 3gbs of ram (got 12gb coming soon from OWC) and a radeon 5870 Standard HD running at factory settings. The weird thing is that for the most part, things run fairly smoothly but sometimes it lags... I use a mac pro at work and it's a slower and older model yet it runs faster than this machine... Any ideas or tools that might diagnose the problem? Thanks!