I've got a Casio and it's fantastic. Weighted keys, full-length keyboard, portable, and a great sustain pedal. I am a pianist and was only used to playing 'real' pianos however when I started gigging unfortunately they were not portable! I was very skeptical when looking into digital pianos as I wanted it to feel exactly like playing a real piano. I am incredibly happy with my Casio. It is very authentic to play and you can adjust the sound settings to your liking.
It was $700AU which was actually very cheap next to all the other models of digital pianos I was looking at, so going second hand would be a great option if you're on a budget. The only thing I regret about mine is that it doesn't have a proper input - just a headphone one. The ones with proper connections were much more expensive.
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