Actually,my speakers came with really nice "gloss finish" brass cones,which look rather pricey.I do like them,but would not care for a generic steel type.I was just curious.
However,and follow my logic,I believe if one can add more "surface area" to the part of the cone,which comes into contact with the speaker bottom,that would be a good thing.My cones are quite wide,but I have seen some new types(I forget where)that look to have massive width.Probably costly,though.THAT sort of intrigues me.
The other solutions,though probably just fine,don't seem to fit my application,being that I am on a rug/concrete floor.
Best!