i think maybe chill RJ-45 should maybe investigate the issue a little further and perhaps visit more than one web site for his information and maybe look into USING SOME PUNCTUATION!
I'm sorry , I couldn't resist.
Anyway I have been involved in this debate several times, on different boards.
Most recently in the HardOCP.com forums ( do a search for aluminum in the overclocking cooling section ).
For a while I was convinced that Aluminum would be better. Someone had posted a table with the radiating abilities of several metals, and Aluminum was signifigantly better.
Then I realized that most heat is removed through conduction. If the fan dies on your CPU it will overheat pretty quickly. If radiation were then main factor it would not skyrocket in temperature.
Okay, enough of this for now.
CU Later