Minelab detectors are considered the top of the line. They are expensive, but very effective and provide more depth than others. White, Fisher, and Tesoro have excellent detectors at reasonable prices. SHTF America uses a Tesoro Lobo which was purchased new for about $700. Its a good machine that has paid for itself many times over.
Detecting is a great hobby that will get you off the couch, out into the boonies for some exercise, and maybe put a few dollars in your wallet. How many hobbies pay for themselves? Get busy!
For a list of detectors, accessories, photos, and prices, click the link to the right.