I would definitely consider another after market coil, I have had 3 11" stock coils so far, 2 of them failed after light use, and I mean light use.I have aGPZ which is the detector I use most of the time, so the 6000 I use occasionally. If I was using the 6k most of the time, I would add a 14 x 9 for sure because I would hate to be hundreds km away from a shop with only a stock coil, and have it fail. The standard 11" coil is good, when it's working, but I will always be thinking in the back of my mind that it's going to fail like the last 2.