Lowa boots all the way. Still got my lowa mountain boots, having worn out Burma pro's and a pair muckboots in the same time.
Used to have scarpa, but then they changed the quality of the leather and the newer ones didn't last 6 months of work!
Unfortunately the best boots I've ever had (still wearing!) are a bit bright for shooting! But still the most comfortable, waterproof and robust boots I've had.
http://arborwear.co.uk/Meindl_Airstream_Chainsaw_Boots