I currently own a Tesoro Vaquero , which I love. However, I would like to get a new detector to add on. I do mostly relic and coin hunting. I was looking for advice on a good machine with different tones and VID for the 600 dollar range. I have read a lot about the AT Pro, which looks like a good one. I was hoping to find out about other nice ones out there. Any input is greatly appreciated!