As Mr M said everything are great value.
Omnisphere - Worlds best software synth
http://www.spectrasonics.net/index.php
If looking for working machine, a “synth” a fantastic synth/psychic-acoustic sampler and much more into one software. It will be Omnisphere -no doubt
Look; check this video and you get the idea what we talking about here.
Try to do “that” with ordinary software’s… 
Native instrument Komplete is great deal.- You get a lot of everything.
Great tools like Kontakt 5, Massive, Reaktor 5, FM8, Absynth 5, Guitar Rig 5 if going to use electric guitars. And Guitar Rig 5 is more then just a AMP-simulator. Its effect machine. NI included “SoftTube”-software’s sounds great too.
Don’t get me wrong I use all of them but if I only can choose two NI software’s it would be Kontakt 5 and Massive.
All my sessions start with Kontakt 5 and Omnisphere. Both are essential! I couldn’t dream not to use them… 
PS…But read here to understand what I mean------------>
http://www.steinberg.net/forums/viewtopic.php?f=198&p=306812#p307126
Best Regards
Freddie