I wanna buy a piano. Help for which one to buy?

I have a Casio keyboard at the moment. To tell you the truth i dont really like it. I don't want a keyboard, i want an actual rich piano. I dont want those huge grand ones. No, i want one that's kind of like those Yamaha wooden pianos with really rich sound? All i want is a nice rich piano without the dull keyboard sound. Anyone know what im looking for?