I’m not proposing that you do it any differently, just reiterating that 8 2.8GHz cores is in fact, more horsepower than most people, even most developers, can use. If you can use it all, more power to you.
It is a lot of power, but there is a big market for high-power workstations for various uses. Dell, HP and IBM are other big players in this market. One FReeper uses it to do video, and having a dual core I can say I wish I had eight for that since renders and conversions tend to take hours.