Both are fine. There's an endless flamewar between high-wing and low-wing fans, but there's nothing wrong with either aeroplane. Only real consideration would be what you are going to fly afterwards (edit: D'oh! Read the bl**dy location, Evo...
) and if a more 'interesting' two-seater is available - converting to a PA-28/C172 is not hard, and you don't really need 4 seats while you are training. Learning on something that requires a bit more in the way of stick and rudder skills will do you good in the long run.