I love my Fisher F-75 SE, upgraded DST. It's really light, great depth, and able to adjust tones, for my hearing. stock 11" E, great coil, have 5" Round, and 6" E Concentric coil, and probably buy the 10" E coil.
Since I've been using the my F-75, primary coil is the 11" E dd, and would like to get the 10" E dd coil, which is a solid coil. Great depth in Disc/All Metal, long battery life, and well balenced, under 3 pounds.
Take care, Ed