Some good faucet manufacturers include Delta, Moen, Grohe, Kohler, Danze, and Kraus. These brands are well known for having produced - and continuing to produce - quality products, often with innovative features, and in stylish new designs.
Many of these faucet brands are easily available at home improvement stores. If you intend to get a high-quality, top-of-the-line faucet, you may need to look for a smaller, more specialized store. Differences between the lower and higher qualities include fittings made from plastic instead of brass or zinc alloy. Regardless, this fact hasn't done much to tarnish the reputation of these manufacturers.