djwayne
...Omnisphere ??...not for a while....
I didn't just pick that suggestion out of the air. Omnisphere and Keyscape (along with Trilian) share the same engine, which means Keyscape can become another soundsource within Omnisphere.
Now, I know you prefer organic sounds over synths (me too), that Omnisphere is technically a "synth", and many of its thousands of patches are indeed very synthy. However, its value as a companion to Keyscape is twofold. The most obvious is that you can layer pianos and pads/voices/strings. Less obvious are all the goodies that Omnisphere brings that Keyscape lacks, such as envelope shaping, pitch-shifting, multi-timbral live mode, filters and effects. They even have a free patch library called "Keyscape Creative" just for users who have Omnisphere and Keyscape that shows off the possibilities.