I highly recommend concrete countertops. They are extremely durable. They will last the lifetime of the home. If they are done right you really enjoy them. Sanitation is not a problem if you seal the concrete with a meadows product from a contractor supply store. This will make the counters completely imperimable. I've built several sets of counters including my own. They are very easy to clean. They do not stain. The down side is that they are expensive if you do not do them yourself.