SDc wins hands down for an out of the box experience,
Then,
A GPX 5000,
GPX 4500. Stopped making them now but still a worth while investment,
QED, A prospectors machine, Steep learning curve but so light to swing all day.
VLF,
Gold Monster.
Can drive you nuts until you master it.
Quite capable
Then to your Multi target machines.
NOX 800,
Nokta,
These machines are a relic machine mainly but will find gold if you are patient enough.
King Daddy is a GPZ Minelab.
Expensive, Heavy to swing, You end up digging to China but,
Will sniff out Nuggets at a considerable depth.