I would take the xlt over the dfx any day, the only thing i can see where the dfx is any better
is that you can take all the claims in thier fancy advertisement and break it down to this
"IT HAs IMPROVED GUESSING CAPABILITY" they just switch the work guess to correlate

,lol....and i would say its only more right than the xlt about 5 % of the time, and it all still depends on the ground conditions of the site your on, so differetn people get slightly different results as with any machine, its still more in what you hear than what you see.
fisher f75 would be my next choice cost a bit more than the xlt though, and has a few minor manuf issues.
the tesoro's work real nice too ive been playing with a silver umax which is pretty basic but it does get good excellent depth also and it pretty damn affordable.
you can pick up a nice xlt used for 4-5 bones
youll shell out 6 or better for f75 used
im not sure what the tesoro's are going for.
Dont buy into all the posts claiming one brand is better than the rest, they all work some work better for some things and some work better for others.
Ill use the fisher the whites or the tesoro depending on what im looking for...
DTM