I agree, Nathanael has give a great and accurate review of The Nord Grand.
Well, I have had a Grand almost since they came out - got the first one that Chuck Levin' s Washington Music received. Actually they never received it, as I ordered it from them as the distributor was shipping to them.
I have used it for gigs and in the studio. My experience has been very good. I think the playability is great - the Kawai keybed, regardless of what mods have been make, is fun and versatile. I have a Forte sitting beside it and the difference between the TP40 and the Kawai is big. However, rembember the Forte is a more general purpose keyboard and is well suited to the TP40.. Having said that, I can do everything I need to with the Nord. As you know, some people love the piano sounds, others hate them. I, obviously, love the sounds. I have used it for all styles of music, including jazz, and it has come through every time.
People at gigs, including other musicians, have commentedt on how much they like the sound. Note that they do not comment on my playing. That says something else! It really is not that hard to cart around. I did not get the Nord case, but one that works great from Gator. It is a little heavy, but that is what you get for a premium keybed.
I have mainly used the Grand in a duo - myself and a vocalist. It has served my needs well, and I highly recommend it. And I have been satisfied even with the single velocity samples in the sample section. There is a lot of capability in this keyboard.