Cheers for the info guys. I have been having similar ideas, the reason being and don't get me wrong, i own a 1200 with a A15 with a 25/65 cam, a 32/36 webber and an overdrive 5 speed. I've bought some brand new pannels for it (bonnet and both front fenders) but i want a better shell, they are so hard to find. I would really want a 1200 wagon to tell you the truth but they are rare as all hell. I had one but it had too much rust and had to get rid of it, kept all the chrome trimings and rear seat.
I am thinking about getting a sunny as the early ones (round light version) looks very similar to a 1200 and are a little more common to get a hold of as well as parts. As you have said they have the better rear suspension so i would say they handle better than the 1200. I didn't know about the engine bay and trans tunnel being any bigger so that is a bigger plus. The weight differance is the only slight down fall but i supose you can't have it all but it makes better way for a CA18DET then
Cheers, Anthony