Ya very true, but rabobank don't allow this. I know other banks have it and is really handy, in that you set it up once, give it a name and then select the account from a drop down type menu for future transfers etc.
However, if you use their money mover you can search a previous transfer to your other account (if you have one done), but as far as I know you still put in the sort code and account details in for each transfer. Well that what I have been told by their customer service.
I don't think this is a great system!!