HI, I have'nt posted in a while, but I was just reading the posts on the 15" coil.... I've tried the bigger coils before on different brand detectors and the weight of them has always been the issue that brings me back to using the stock or smaller coils..... that being said, The T2 SE with the 5" coil or the stock 11"DD coil have always been sufficient for me and never dissapoints me with finds........ I'm afraid most guys will find that size coil in the closet more than on their machines after the new wears off of them and the weight difference against the stock coils starts to kick in.... Just my opinion......