These are quite different vehicles in terms of their physical size. While older generations of the RAV4 were known as compact SUVs, the current model is resolutely mid-sized. None of which is to say that the Yaris is cramped but it is a size-division smaller, so if you often carry people in the back seat or your family is growing, the RAV4 might be a bit more future-proof.

However, in driveline terms, the Yaris is the one that is truly future-proof thanks to its hybrid driveline. If most of your driving is around the city and suburbs, you might be surprised at just how efficient a modern hybrid can be. On the highway, there's less to be gained form the hybrid layout, so take that into account, too.

The other thing to consider is what happens a few years down the track at trade-in time. The RAV4 is question is already one generation older than the Yaris, and the hybrid Yaris is almost certain to be worth more as a second-hand proposition five years from now. Which means the latter will probably be the cheapest to own over that time in a wholistic sense.

The Holden Spark has been discontinued in Australia, with the company citing low volume as the main issue. But if that doesn't deter you, it's still a solid buy at under $15,000. Dealers have plenty of stock still on showroom floors, and you can get really good prices on 2017-plate models for less than $15k, drive-away. Shop for the LT if this is the car you like most, because it has a better features list than the LS.

Probably best to steer clear of the regular Barina, which is admittedly bigger, but definitely not better. The current-generation model could find its way to the automotive graveyard this year, too. 

The Mirage isn't as good as either the Barina or Spark, so unless you just want a very inexpensive car, it's not high on our recommendation list. The Yaris is lagging behind the times in terms of features, but there's a reason it's a go-to for many budget car buyers: it's a strong offering for space and comfort. 

All of that said, the Kia Picanto is the budget car we'd most likely recommend, because it has a strong and long warranty and is the only one in the mix with auto emergency braking (AEB). Plus it has a reversing camera as standard (the base model Spark doesn't).