If I could buy an Nox 800 today I would but the Kruzer is on the radar also. Relics1864 posted a video reviewing the Kruzer and it passed the nail test even down the barrel with the stock large coil. I don't think the Nox with the stock coil will pass the nail test 100%, atleast I haven't seen it yet. And from what I see no modulation on the Nox. I know multi frequency is the buzz but it didn't work well for me in my soil with Explorer or CTX. Analyzing that many frequencies slows everything down, mainly recovery speed. The Nox may have that conquered with the speed of modern processors. There's a lot to be said for super analyzing one frequency though.