Having bitten the bullet and coughed up for a sub £200 Garmin 2610, (thanks to the Bargain Forum on here ), I'd like recommendations for the optimum size of Compact Flash card to use in it. Ideally, I would like to have UK, France, Switzerland and Italy, at least, on it. Crucial do Compact Flash cards up to 4Gb in size, but do I honestly need one this size?