Ok i have a presscott so i will deal with this matter since i know how it is. Ever since i bought the zalman copper(50$ one), i have been at 40-42 idle which is good for a presscott. I suggest the zalman reserator for a easy water cooling to cool it. I have been able to OC my presscott to 3.7 with my HS and it only got up to 52 C. You do't need fans, just get the water cooling or the HS i have.
http://www.newegg.com/app/ViewProductDesc.asp?description=35-118-115&depa=0
http://www.newegg.com/app/ViewProductDesc.asp?description=35-118-115&depa=0