I am concerned about ruining my knives

Wooden boards are fabulous and the best choice to look after your knives. Glass boards look fabulous, but they are nasty to knives — your knives will dull quickly. Most acrylic boards are OK for knives, but wood is best.
                         - startcooking.com/blog

We are ‘end grain’ specialists. End grain cutting boards allow your knife to cut between wood fibers, not across fibers. The fibers will close in a self healing way. Flat grain boards will dull your knives much quicker and cut marks show up faster and deeper.