Making a computer quieter?

[The Amish Kid]

For the cpu I suggest a zalman 7000b-cu I have one and its VERY quiet. For your case though what is the sizeof the fan thats there? I suggest these fans if you want it really quiet.
http://www.silenx.com/fan_pro_74.asp
Im not really sure about any really quiet powersupplys though. You could try seasonic's power supplies like this one
http://www.newegg.com/Product/Product.asp?Item=N82E16817151024
I have read good things about this powersupply in reviews

 

[GlasseyeUK]

I have used Speedfan to determine my temperatures, and it is showing that at rest its about 38 degrees centigrade, after intensive use, well what I would consider intensive then its about 43.