Wow guys thanks for the really comprehensive answers to my questions. That's a massive help.
Most of our driving will be for doing the school runs and going to the shops so the infotainment/satnav system isn't so important for us. It just needs to be reliable and has at least most of the features we have on our GD. One thing I forgot to ask is about the handbrake. We have a very steep front driveway and need a very strong handbrake. With our GD, leaving in gear only is not enough, the car still moves whereas with other cars it seems ok. I'm just wondering if the handbrake on the current model is good?
The ex-demo option is a good shout, we were attracted to the 0% finance deal honda has on at the moment as it meant we don't have to fork out so much right now but I think we'll definitely take a look into this as its quite a saving.