I wouldn’t pay $6000 more for a 2015 model than I would for an equivalent 2014 model; the most I would pay would be $3000.

If you're using mostly it around town, as I suspect you are, the consumption is about what I would expect.

Kia's own claims for fuel consumption for urban (city) use is 15.1L/100km, and the driving range is a little over 500km, smack on what you say you are getting.

The average of combined urban (city) and extra-urban (country) is claimed by Kia to be 10.9L/100km.

The bottom line is that it's a big blob of a vehicle with a relatively large engine doing the work, that's not a recipe for fuel low consumption.

The iMax is reliable and would win in terms of storage space. The early Carnival with the V6 motor was troublesome, but the later one is quite reliable and could be bought with confidence.