Aluminum flywheel or not?

I am wondering what those of you using aluminum flywheels think of them on the street and track. I understand the theoretical pros and cons but how bad is it on the street? I found a brand new one for $300 cdn.
 
In my opinion, anytime you can reduce weight, particularly rotating weight, it's a good thing. I had an aluminum flywheel on my 3,600-pound Mustang Cobra with no problems, so I'm certain it will be fine on a GT40 that weighs 1200 pounds less.
 
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