Wood countertops- wow, what a refreshing alternative. I love the look and frequently bring them up as an option to my clients when they will fit in aesthetically. And for your kitchen, they seem like a perfect fit.
You have to expect that wood countertop will show wear, so your husband has some legitimate concerns. Most people consider the wear part of the charm and embrace it in a cottage/farmhouse style. Lighter woods and butcher block countertops disguise their wear better.