No plastic board should knock the edge off a good knife. Of course some people think Henkels are good knives.
Bamboo is supposed to be good, I have a heavy Maple board, a glass board for onions, they make wood boards stink. I use 2 knives, a Chinese cleaver that cost 5 bucks, and a Santoku that cost 30. Been using Santoku's from WAY before they were trendy. I also have Henkels and Wustoff, never use them, junk. Unless your board is made of sandpaper it should not dull your knife.