I assumed from your original post that you wanted to get rid of electric storage heating altogether.
What do you mean by "more control" with storage heating? You can get combined storage and convection heaters if that's of any use - most of the heat is provided by the storage facility but you can boost it using the convection part if necessary. Not cheap to run the latter though.
If the house itself is also old then it might be an idea to see if it's adequately insulated while looking at replacing the heating system.