A fellow in Charters Towers (Bobby), related to a well known metal detecting personality compared his modded GPX 5000 up against a SCD2300......after testing he said "I thrashed it" then a GPX7000 was produced..... "I thrashed that also" was the statement that was made.
The same result came from Halls creek with the side by side comparison.
Minelab make some very good detectors, but this new thing they have out...what can I say?, just go and read the detecting forums that are not subjected to commercial bias.