I'm looking to purchase a G4 Quicksilver but I just haven't found THE one I want yet. I do have a few questions. Currently there are two different models posted on CL, both have the highest single processor speeds for their model. Would I be missing out on much if I hold off for a Dual Processor? Also, I've been wanting one that can boot into OS 9. According to Wikipedia, on the maximum OS, it has these as Leopard but the rest of the models, including DP, as Tiger and OS 9. Is the running of OS 9 because of hardware or because Tiger still allows Classic? If I do end up going with Leopard on these am I giving up the chance of using OS 9?