Thanks all, seem to be a general consensus that the Robin is more enjoyable to fly, and given that I'm only in this for the pleasure aspect it seems to be more suited. I've booked a trial lesson this weekend at Sibson who have both at the same price, so I'll have a test drive and see what I think!
Another question; I note most clubs rent out planes per hour, usually on a brakes on / brakes off basis. What is the normal situation if you want a plane for a couple of days; do you still only pay for actual flying time, or do they charge you per hour for time the aircraft is away from base as well?