In terms of sounds and styles I cannot place an order of 1,2,3. I can however tell you my favorites of whats available on the market today. I am not going to include TYROS until it is in my store and I can play all the styles and sounds like i've done all the other ones. My opinion from just hearing it for a short time a few weeks ago is that it will be right among the top models on my favorite lists.
Ketron XD9/Vega and SD1 are on my favorite list (not the X1 because of it's piano sound and older numeric system for calling up styles and sounds)
Generalmusic Genesys (It does everything well so far!. Some might not be happy with weight, a carry over of WK8 sounds and some styles, but with enough new sounds and styles to surely satisfy most players)
Korg PA80/60(A very well rounded keyboard although I would say in the style and sound dept. just a notch below the other ones mentioned)
These all have outstanding sounds and styles. The Piano is stronger on Genesys and Ketron then the PA80, but I still like all the sounds on the korg.
In the next group would be the Yamaha 9000pro, the Roland VA76, the YamahaPSR2000.(Piano sounds better on the 9000 and VA76 than the PSR2000, but the 2000 has to be up there for styles and sounds although much less expensive than the rest. The Yamaha 9000 and VA76 have what I would call older type styles that are a little more bland and less exciting than the top choices and even the PSR2000, but many customers still choose these because they like more neutral styles).
I would put the Generalmusic WK6/WK8 just behind this group(sounds not as strong but still great styles)
The hard part of trying to group these keyboards is because in some areas, even some of the second tier models are as strong if not stronger than the first, but if you are asking me my opinion as to which ones my ears like to hear the best and which ones get my customers the most excited, I will stay with my choices.
George Kaye
Kaye's Music Scene
Reseda, California