[Thomas Hughes]" Does one want to spend money on a fast processor? RAM? "
Yes. Yes. Actually more cores. 8 cores is currently the best (dual Quad). I've heard people varyingly say a minimum of 1GB or 2GB per core. So an 8 Core with 8GB or 16GB even better. If you can do 32GB RAM go for it. You then create a "QuickCluster" (Virtual Cluster) in Qmaster.