METAL DETECTORS: Need recommendations for one around $500-600 for general dry climate hobby type work.?

I have looked at the major brands, (White, Garrett, Tesoro) plus stuff from stores such as Radio Shack and Cabelas. I want one with a removable battery/control pack so I can put it on my belt and headphones. Not searching for anything specific, like gold or silver, just want a metal detector that is well made for general searches.

I have a Bounty Hunter LandStar. It also happens to be for sale.

Metal Detector probe

Treasure Hunter Metal Detector $89.95 Treasure Hunter Metal Detector

National Geographic Deluxe Jr. Metal Detector $37.99 Junior Digital Metal Detector can be used in either full-height or compact configurations. Brightly Backlit LCD Screen Indicates Search Status Battery Life and Detection Signal Strength. Detector has a Water Resistant Search Coil can be used in Wet Surroundings Such as Wet Grass Sand a

Pioneer EX Metal Detector $120.81 Bounty Hunter Pioneer EX Metal Detector

HEADW Metal Detector Headphones $34.99 Bounty Hunter HEADW Metal Detector Headphones are small and lightweight and are designed for use with bounty hunter metal detectors.

Bounty Hunter Metal Detector Binaural Headphone HEADW $37.02 Bounty Hunter Metal Detector Binaural Headphone HEADW