First of all, i'd like to know if it is worth it having a dual/quad core processor if I don't plan on multitasking very much. Are there programs that utilize the full potential of having more than one core?
Also, how important is the speed of the processor in ghz? I was told that AMD 6000+ doesn't perform as well as the intel e6750 but the advertised processor speed for the AMD is higher than that of the intel.