Slightly off topic, but what you just mentioned about the Gallet helmet reminds me that a year ago when we were in the process of testing new gear before deciding on what to purchase, we tried a Gallet F1, which is produced by the MSA group, and were surprised to find it was not compatible with our MSA BD96 Ultra-Elite facemasks, how odd, two products by the same company designed for the same part of the body that don't work together.
As a result we are still stuck with our flipping horrible Cromwell F500's, any ideas?
I do some commercial training as well outside of my normal work on a sub-contract basis for the purposes of which I bought a US style Cairns 1010. This is the cheaper end of the North American market but it's by far the most comfortable and robust helmet I've ever worn, it works easily with the BA mask and ... it looks good!