There is another way to make comparisons. Get a sterling account and euro account with La caixa and when this is up and running you can get sterling transferred from your UK bank into the sterling account in Spain then watch the euro rate which at the moment is something about 1.485 and  the Spanish bank will give you about 1.465 to put into your euro account and a charge which will maybe cost a lot less than money dealers who live off your money,and you can negotiate with both banks. I have been doing this on a regular basis for the last two years.