Folks, I'm trying to get an idea of what's available for decent prices. Here's the situation - I just built a rig for a friend of mine and he's concerned about the mid 40C temps that his Duron 900 (default speed and voltage) runs at. He's afraid that it may go above 50C. Needless to say I told him he had nothing to worry about unless he started overclocking or the fan on his current HSF (OCZ Monster w/copper insert base and Arctic Silver) fails. What would you guys recommend if he wants to step up to a more efficient HSF? He specified a $40.00 spending limit. Any and all comments or suggestions would be appreciated. Thanks folks.