164 would definitely be as big as I'd go and I definitely wouldn't get a wide. A wide board, especially one that big, is gonna ride pretty damn sluggish with size 10 boots. Honestly, I think 161 would be the better fit.
So including gear( approx 15 kg and me 85 kg ) you would recommend a 161?
I now understand that the 163W would be sluggish, but feel the 164 might be a bit big considering I am only 167 myself