Thanks for the input.
Yes I definitely would be able to get a higher spec model , since the discount they have offered is more than R50 000. I think I'm going to go for it. I'm aware that the new car has a slightly wider stance, but the engines are the same and you don't get any extra stuff for free.
I think on the interior a few of the knobs are now metal instead of plastic but I can live with that. As for resale , I'll keep the car for at least another 3 years , so I don't think there will be too much of a difference.