If there was a ctx 4040 , that would be close to the perfect machine one would think . However if an old sovereign can take down a ctx 3030 in a friendly competition on the busiest beach in South East Queensland , you could have a ctx 7070z and get out performed by a sovereign with a 15 inch wot on the same section of beach , dirt etc , what it comes down to , is not the detector but the operator of the detector , if your comfortable with your machine you will become an operator instead of a " driver " or user of you machine . As an operator your the master of your detector , as a user the detector is the master of you. The results of your efforts will reflect this analogy. Most detectors are so similar in capability except a few exceptions , the operator makes the difference between detectors.