Thank you all for your replies. My ground here in Ohio is pretty good, and I do get good depth with the stock coil. I need to measure one of these days. My favorite spots are usually quiet parks, not too much junk and old, so I am thinking I am not getting the deep stuff. When I first started hunting these parks I was getting a fair amount of silver and Indians. These parks are old and have been hunted by everyone who owned a detector including me, but when I bought the Etrac years ago I couldn't believe the silver and Indians I found that others had missed. Now it seems to have dried up and am thinking a larger coil will get me that deeper silver. I appreciate all the input and it seems most of you like the Ultimate 13. I will do some research and watch some videos and make my decision. Oh and one other thing. I always use Auto +3. It just seems cleaner sounds and VDI. I will have to try manual sensitivity since reading so many posts about better depth. I always knew it gave better depth, but just liked the way Auto +3 sounded and VDI'ed.