Trying to decide between a Quattro and an X-Terra 50 or 70. I am currently running a DFX, which I really like and intend on keeping but I thought a different machine would make detecting a little more interesting. I know the X Terra's are lighter and more basic than the Quattro. The Quattro seems to have more depth but a higher learning curve. I hunt mostly cellar holes and old fields as I don't have parks or the beaches nearby. The things I find are well earned as most of these sites have been hunted before, but I think the silver was just skimmed off the top. What are your impressions with the Quattro, can you swing it all day, is it hard to learn, can you save programs like on the DFX? And what can I expect to pay for a good used one. I haven't seen any used ones on the classifieds and take that as a sign that people tend to hang on to them. Thanks for any input. Ron