Jim, you have posted this at the most perfect time, at least to me. I just bought a Garrett Infinium myself, although I have not gotten to use it for prosecting much, it is the most stable machine on hot ground that I have ever had in my hands. I do have a hard time with it in high-iron, trashy grounds though, I have been in areas where there is so much iron, the Infinium starts sounding like a overly-hyperactive 5 year old boy with a harmonica in his mouth, at this point I have a vry hard time trying to tell the difference between the hi/lo and lo/hi tones. I have found that during air tests it doesnt want to respond very well to regular clad coins much, unless they are near-surface finds. However, this machine really loves non-ferrous metal as much as it loves iron. Everytime I hit something of non-ferrous nature, this machine really belts out the tones loud and clear. I would highly recommend this machine for prospecting, just be prepared to dig up alot of iron. This is not a bad thing when using this machine in the river for placer gold or silver, as the iron junk will fall and settle right where the silver and gold will be found. There is no way around it, when prospecting, dig all signals. It sucks, but its necessary.