Zalman silence for a 2.5+ghz P4 and one for 9700?

[Lithium]

Would this be a bad idea, I'm in the planning stages of a new computer and I really want it to be well quiet. I've heard great things about Zalman but I'm wondering if using two especially on higherend parts like this would just be a disaster or if it could be pulled off with the right PSU and or case fans and or case.

[GamingGod]

ive heard of people using the z50a? or whatever its called on 9700pros, as long as you have a fan bracket you should be fine there, i dont know how far the zalman heatsinks go though, im pretty sure it would cool a p4 2.53 with medium airflow though.