I want to upgrade my existing radiator for an aluminum one. I can get an aluminum / plastic one for under $200, as you know. Don't know that it is a direct bolt in replacement - my guess is that it requires modifications for mounting, shroud etc. Or, go with a Be Cool that's a bolt in direct fit, all aluminum, but $630. My mechanic said the aluminum / plastic ones should last 5 years before leaking. So even if I had to replace it twice to the Be Cool's initial costs, it seems a cheaper solution. So, guys, besides the obvious price diff are there compelling reasons to go with one or the other? TIA!