For a one eyepiece/all around setup there is no question- William Optics Zoom II, it gives 17-52x, bright, long eye relief, large FOV, only weighs 10 ozs. I have had the XF 8.5mm, the XW 14mm, and WO Zoom at the same time and compared all three on my PF 65 EDA II. I have also compared the WO...