Which electronic keyboard ? P-l-e-a-s-e !!!!!?

I need help and advice on how to choose a good electronic keyboard for the family. This is something I know absolutely nothing about so good advice will very much appreciated. HOw do we choose a GOOD one ? What features should be included ? And Is Yamaha better than Casio and if so which model ? I tend to think that perhaps Yamaha will be a better brand. Anything please let me know and thank you so much.