I have recently tried to slim down my kit and the most difficult thing was the helmet. I used to have a GN batting helmet and a Masuri keeping helmet. I've gone with a GN XRD (test opener is the same shape) and it seems to be perfect for both roles. I know some people in the past have posted looking for a keeping helmet so thought it would be useful. Masuri are meant to be bringing out a new keeping helmet but I think it is next year.
Also, when I read the instructions for care for my new helmet it said replace after 2 years regardless as they deteriorate. I imagine this is to cover themselves but it could mean a lot of people are playing in potentially dangerous equipment. Given the pace I face, I doubt it would make much difference as the XRD is designed for test level.