Garmin Edge 605/705 question

Hi all,
Im looking for some advice - Im looking for a GPS for a present for my Dad - a GPS thats well suited to cycling AND walking as he does a lot of both.
I've managed to find the Garmin Edge 605 & 705 models which seem good to do this, but my knowledge of the GPS market is quite limited - is this the one to go for or can anyone recommend a better one. I should mention- hes a big fan of the Garmin brand, so a Garmin model is ideally what Im after.
Thanks a lot in advance!!!