I searched threads but no luck with this, if someone can point me to one that`s great. My gut tells me to just go with the 4 core brass soldered/repairable even though they seem to run about $400 (fjparts and CCOT). The 3 core aluminum are less than $300 (CruiserCorps) and some on ebay less than $200. My first concern is which is better for me....I`m not an off roader though here in CR 4x4 is pretty much mandatory as soon as you leave the pavement. I live in the relatively cool mountains so air temps will rarely be a factor. I guess my main concern with the aluminum rads is that is seem leaks are not repairable (at least not here). Even though they are lighter, dissipate heat better (so they say) and look really cool I am shying away from them BUT I would welcome any real life knowledge as to choosing one or the other. Thanks!