I wouldn't consider it as a fantasy item but there's a real problem with the black version. Unfortunately, there is only one or two European-style armors that look good with that helmet. It looks strange when used with heraldic armors and it's the most popular combination.
If the color would be changed to brown, the helmet would look nice with some of the light armors. However, the brown version is not perfect too.
In any case, I'm going to add a new custom version of the sallet: