Something that's been nagging me in the back on my mind with Quad/Hex vs Octo is virtualization. I do a fair amount of it in addition to Mac-native development and design work. I typically have 2 VMs running within Fusion and will more likely be using 3 at a time once I get the Pro (various versions of Windows, Visual Studio, SQL server etc etc). What I don't know is if Virtualization performs better with 2 physical CPUs. I've only ever done it with 1. I know Fusion's recent 3.1 update added support for 8-way SMP. But does anybody know the overall effect of single vs. dual? I'm debating now if I should be looking at octos (2010 or refurb 2009) vs the new 3.2 Quad or 3.33 Hex.