Both the Explorer and the Shadow X5 are great detector plus there is many more too. I used several different one just to see how they will work and will say the X5 was a great detector and does have some great depth too. I did some side by side comparisons too with a guy with the XS when I had the X5 and we could do about the same on target. The XS has the advantage to tell the ID of the target better too.
I have also use the X3 and find this one is a better competition detector and maybe a clad hunting detector, but the X5 will go deeper and work better all around and if I had to pick the X3 or a XS i would pick the XS with no second thoughts about it.
The X5 also has a learning curve too, but not a steep one. I find any target not disc out will lock on if you speed up the swing of the coil, but iron or one disc out the signal will break up when the coil is swung faster.
What is nice about the X5 is it is light weight and you can swing it faster,but like I say will not ID like the XS will.