I have never used a metal detector personally for meteorite hunting. Over the years, I have owned or had access to a few detectors, but I was not into meteorites at that time. Meteorites is a fairly-recent obsession for me that has only taken root in the last year - and reached a fever pitch in the last 4 months.

I have plans to get another metal detector and do some hunting of my own in the future, but the wife and I are not free to travel right now, so combing the deserts with a metal detector will have to wait. Basically, I am in the a similar place as you with metal detectors - curious and researching my options. I honestly don't know jack about the different brands of detectors or their features.
A metal detector, a rare-earth magnet on the end of a long probe, a GPS, scale cube, file, loupe, and specimen containers would be in every meteorite-hunter's basic kit I would think.
Regards and clear skies,
MikeG