Kawasaki Ninja 250/300 or Yamaha YZF-R3 or Honda CBR 250r?

I'm a beginner rider looking into buying my first motorcycle.

I'm an 18 years old female who's 5'3".

Bikes with a seat height under 800mm is ideal for someone of my height and experience that is why I've picked out these bikes. The seat heights of these 3 bikes are 780-785mm. I'd like a bike no older than 2007. One with easy maintenance and parts that aren't going to cost my an arm and a leg if something breaks on the bike. I know the 125's are cheaper however I've heard although they are a lot of fun, they aren't all that forgiving and I like the power that 250/300's have to offer - I feel they're better suited for me since I don't want to go selling and having to buying another bike because I want more power after riding a 125 for a couple months.

I like the look of the Ninja's and R3's but ultimately my choice with come down to comfort, affordability, easy to ride and of course forgiving to my beginner self.

I'll be getting a bike second hand for no more than $3500 Australia dollars so your recommendations would be much appreciated.

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