I was going to say the White's XLT, but it's been discontinued. Although I have no experience with it's replacement, the MXT E-Series Metal Detector (http://whiteselectronics.com/mxt.html), we have successfully used a number of XLTs over the years to help find non-ferrous unexploded ordnance. The XLT had a good combination of reliability, durability, and reparability. Based on the similar design, I hope the MXT offers similar traits.

Cognosyeti, at $800 is the MXT considered a midline, low-end, or top-line model?

On a similar question, I posted this suggestion:

If rental stores offer these, try out various brands. Or if you rarely plan to use it, rent out a top brand all the time. (As long as the rental fees are reasonable.)

One of the best recommendation I can give you is to do your research online. Look at reviews, check out resources (Boomer’s Detector Guide, etc), and really get a feel for what you’re looking for. I liked Roger’s suggestion, too. Renting a couple and getting a few for them is a great idea. 

Kevin there are many.. why don’t u compare yourself and get the best which suites your need? like some prefer light weight becaouse it helps in underwater Detecting i found few metal detector detail comparing websites and this is one of them wikimetaldetectors.com

hop this help Kevin