Goodmark vs AMD vs Sherman vs ??? who makes the best quarter panels?

Stay away from Sherman.

I had to use a set of quarter skins for a '70 Superbee, I ended up rolling the center body line in myself that was not present.

The wheel lips are about an inch too wide and the bumper relief was 2" too short! I had to rework it with a wooden buck made from the original shape on the old quarter and an air hammer with a custom head.

I'm wondering if I would have had less work in fixing the bondo hole drill dent pulled POS originals that were full of rust.

They look good, now, but I'll never buy anything from them.

Used OEM or AMD are the way to go.