Thanks for all your advice! This really seems to be a bit tricky, but as you say this will not be the only bokken I buy. I think I will try with the heavier red oak bokken although itīs cheeper than the white oak one I bought. Some at my dojo uses similar ones and they seem to be quite alright - at least they are heavier so my sensei canīt complain there. Also I personally like darker wood better (staedily going against every current design trends, so it seems
).
Again, thanks to all of you who have replied! This is really a great way to share information!