It's said that the router bit is more important than the router itself. After all, the machinery simply provides the force needed to push the bit into the wood. When selecting a router bit, there are two major choices on the market; high speed steel bits, and carbide. High speed steel is durable and cheaper than carbide, but dulls faster. These can come with titanium drill bit coating, but working with hard wood will strip the coating away faster than you might expect. Carbide router bits are longer lasting, but can be brittle. They are more expensive than the high speed steel, but the extra money goes farther over time. You'll most likely replace a high speed steel router bit more often than a single carbide bit.