We're in the same camp as you. We are submitting our recommendations to replace the Studio department's computers. Currently they are all using G5 towers, dual 1.8 to 2.3GHz, with no more than 2.5-4GB RAM each. Many have secondary internal scratch disks. They all have stock video cards. We will be upgrading to CS4 in Q3 and need to have our hardware replaced by then. I am 90% certain we will be going Quad core Mac Pros, 2.66GHz, 6GB RAM, GT120. We are tight on cash and having an upgrade path for the graphics card will be our saving grace in 2 years. But I am hoping we can upgrade to beyond 8GB.