Thanks for the advice guys, it's been much appreciated.

I think our main train of thought was how good it would be to finally own our PPOR outright as we don't seem to be reducing our loan too quickly, but it probably wont help us in the long run. We are in our mid 30's so we've got plenty of time up our sleeve.
I was talking to our PM for IP1 yesterday and he was telling us that a new shopping centre was to be built nearby in the next 12 months and we would be mad to sell at this time.
 
Again, thanks for your thoughts
Rod