For me, my thing is, the Bosendorfer, the sound is sweet and full, infinitely adjustable from German concert grand piano ... and there I will not tell you about the quality ... It's a bit heavy (I do not care, I have a swollen config), it's expensive, but ooh my, it is good! And other sounds are not bad either (electric piano Yamaha- a killer, the upright piano: incredible, and I have a girlfriend by Steinway that has not been returned!).
If you are a little pianist, forget about the others and go for this one!