He's right, the 705 is great, and you can change it's frequency by switching coils. You can also get a Whites M6 for about the same amount as an ATP Pro. It has a lot less bells and whistles and is not waterproof, but I have a feeling that it will also outlive an ATP Pro in the field. The M6 is a proven machine that has a LONG track record of successful use. It has basically the same operating electronics as the MXT, just not as fancy. People also swear by the Fisher F70 too, and it is also in the same price range and loaded with features. The Tesoro Tejon is also an incredibly loaded machine that you may want to consider. It all comes down to personal preference and exactly what you are looking for, but in my opinion, I would not buy anything outside of the brands that I have listed.