I would, but this hobby is often more subjective than anything else. I have both a ralf Aust and a Hart , I reach for the Aust far more often. It's not a quality thing, just my preference and why I suggested taking a look at what he has already. That being said, if my wife were to get me a straight I would be happy that she put thought and effort into even if she didn't get me the "perfect" razor.
Like has been said already my vote is for a ralf Aust 7/8, my shape preference is toward square points and shoulder less grinds. I also prefer blonde or honey horn.
I think it's awesome that you are taking this so seriously, and I believe your husband will be tickled pink just by the thought and effort.