I checked the DFX but bought the GTI 2500! The question wasn't which one to buy but which is best. I don't think either one is "best". I do think the DFX probably has the most modern techonology, but I like the controls and features of the 2500 better, and from what I have read on this forum it is easier to learn to operate correctly. No doubt about it both are really good detectors. I see more finds on the forum from DFX users, but ther are more DFXs in use than 2500s. I also see a lot of posts by frustrated users of the DFX who apparently don't have a clue how to properly operate it! Speaking of choices, I talked to a guy yesterday who is using an XLT and a $300.00 Radio Shack BH clone. He said he was thinking about selling the XLT and just using the Radio Shack detector. So, he is wanting to move down instead of up! He said it was a lot easier to operate and he finds just as much stuff as with the XLT! I told him I had heard that the XLT was a fine detector and he said it is, if you have the patience to fiddle with it, while he just turns on his Radio Shack detector and goes! So, in the end I think it's just what floats your boat that determines what the best detector is! Monty