I am not saying that the MP is bad, but here near where I live, there is a computer store that have a Dual Tualatin System with a Supermicro board(about 250 dollars)... and the speed/stability is great..

The problem of MP is the temperature, is almost impossible to maintain the cpu temperature under 35... and a Tualatin can keep about 34 when you OC it from 1.13 to 1.42 with those Retail cooler...