If I remember well, downloading NSK took less than 21 gig. On the other hand, don’t take my word for it that LL4 is up for an update, I was just guessing due to the time it’s been out. As for NSK, its earlier version was Kontakt (Player), while NSK 4 was UVI. The latest (NSK Studio) has its own engine. By the way, I also got Overloud VKFX before I got NSK Studio. The included VKFX version is different, at least as far as its looks are concerned, but also some effects.

Fleer
If I remember well, downloading NSK took less than 21 gig. On the other hand, don’t take my word for it that LL4 is up for an update, I was just guessing due to the time it’s been out. As for NSK, its earlier version was Kontakt (Player), while NSK 4 was UVI. The latest (NSK Studio) has its own engine. By the way, I also got Overloud VKFX before I got NSK Studio. The included VKFX version is different, at least as far as its looks are concerned, but also some effects.

I just downloaded and it is 19.4GB. 
Don't worry about the LL4/AP4 possible update--if it does happen it will be worth a look, but I also will look into Pianoteq EP for a modelled version, but I did not have the money for it yet (it cost $120+).  Something for a future wish list.
 
Right now I am just going through some of the presets for Neo Soul Keys.  I am pleased that it does have the grit/grind/tube style distortion built in.  It will be a nice addition and it does provide something that the other EPs I have do not have--that dirt.  It is fun to play.
 
Thanks again for your help.
C2

You’re welcome, cecelius2. Also look into the many different keyboards Jamal added, like his famous and beloved Dyno.
NSK is just wonderful, indeed. If the great George Duke loved using it, who are we ;)