I currently have 4 GB of memory in this setup. How do I tell if I should bump it up to the 6 GB max? When I am running Aperture 3, it spends a good amount of time processing even when I have "Faces and Places" turned off. The activity monitor currently shows the Page Ins as 26 GB and the Page Outs as 80 MB's with 39 MB of free memory. Thanks!