I guess now it's time to tell you the downside of multiple CPUs: Some applications or drivers are not prepared for two CPUs. I remember Creative's software for the SBLive! being a prime example of software that crashes on two CPUs. Two CPUs generate twice the heat and require twice the cooling, therefore often creating more noise than a single-CPU system. The cost: AMD and Intel are intentionally removing SMP functionality from their low-price CPUs Duron and Celeron*, making systems with two CPUs very costly. Software that is not multithreaded (which is true for most applications) will be as fast as with one CPU. Two CPUs will not speed up Poser rendering and will not make you able to use more tracks or effects in Logic. My opinion is: Two CPUs are a luxury unless you extensively use applications that take full advantage of them. If not, better invest that $300 in RAM, software or a romantic evening with your loved one. Stefan -- Please note that this is my personal opinion and that is not related my job or my employer's opinion. * The Celerons up to 533 MHz can run in two-CPU systems with special tricks - those were the exception to the rule and have no significance when buying a system today.