So, if you were ordering a new Cobra trailer, would you order a fiberglass top or an aluminum top? For sake of discussion, lets exclude obvious price difference.

I've never seen an aluminum top with insulation. What type of insulation is used and is it worth the 1000 plus euros?

For those having a reasonably new Cobra trailer, in your opinion, what options are "mandatory" and what options are "losers"?

Thanks for your feedback.