Hi Carl,
I just upgraded my old Garrett ADS-5 to a new machine. Like yourself I had been away from the hobby for quite a while and an interest in searching for meterorites reignited the hobby. The ADS-5 is using 20 yr old technology and I felt a newer machine was would certainly serve me better. Brand loyalty steered me back to the Garrett line However the other factor that played heavily on creating my short list was the date a particular machine was placed on the market. I didn't want to purchase a machine that was at or reaching the end of its service life.
In any case I did extensive research building my short list. When compete it had three entries 1.Garrett GTI, 2. Explorer II, Whites "E" series.
Next I decided to visit a local dealer ( http://www.tcmetaldetectors.com/ ). Tony the owner has been detecting for the better part of 30yrs. We discussed the pros and cons of each detector on my list. At this point I was partial to the Garrett GTI (brand loyalty) and Tony had no real critism against this or the other detectors on my list.
During my discussions with Tony on this first visit, after I was pretty well saturated with technical details, and still uncertain as to what machine to select I asked Tony what he used as his personal machine. Out came a well used White's DFX. Tony gave me his assessment of the DFX and the reasons why he chose it as his personal machine.
To make a long story short I chose the DFX based on my research and followup discussions with Tony of TC Metal Detectors.
Am I pleased with my decison? you bet. The single most important feature of the DFX in my book is its extensive collection of programmable settings. You can start with one of the preset programs right out of the box and start searching (plug and play).
For me however the plug and play quickly gave way to adjusting the various settings in order to optimize performance for the type of searching I was performing.
Good luck with your search for a new detector