For what it's worth, I bought a few copper tops last year, kind of a treat to myself because I just liked how they looked. I still carry an old flat top out with me to use as a table, but that effort does not bother me.
One advantage is that the tops are heavier and less likely to blow off in a storm.
And, Bjorn, if your hives are stacked so high that lightning strikes are a problem, I would be interested in knowing how you get the honey supers off! [img]tongue.gif[/img]
The keeping of bees is like the direction of sunbeams. -Henry David Thoreau