I primarily hunt sandy beachs , saltwater, but I am not a water hunter. I do look for coins also and any other items of value wherever I am at. I was thinking of getting the 705 but maybe that is just to similar to the 70 I already have. I do have all the coils for the xterra 70. My xterra 70 is about 3 years old now but works perfect everywhere I use it. Was thinking maybe minelab would come out with the latest and greatest , maybe another xterra model. So my question is what would compliment the xterra in a lightweight package that is versatile , easy to set up, ergonomically correct, deep seeking and accurate?