If I only wanted speed, all my needs would be satisfied, but I want Amiga... Gigahertz is like Watts in HiFi. A 500 W amplifier can sound really bad compared to a 50 W amplifier. It's all about what you need it for. I need a useful computer that responds to me in the time I like. It's MS Windows fault PC's doesn't do that, not the Gigahertz in the processor...
Just my two cents..