PG Omni pack which I bought the Omni Pack the first one is musical performance related. It's not instruments or
VST's.

I would look at Komplete Ultimate and Arturia V too first before I splurge on Omnisphere. Which I have. PlugIn guru makes many 3rd party sounds that enhance that synth. But you also have SynthMaster and can buy 2 or 3 vst's for the price of Omnisphere. Omnisphere is fabulous for soundtracks. Out of the box it offers many strange sounds that you may or may not have the imagination to use. I appreciate the effort but Synthmaster seems to me to come with more usable sounds right out of the palette. I love Omnisphere too but I think $479 is a lot and I bought it on a whim. I have never paid that amount for even hardware synths. But it is only one synthesizer while I can get synthmaster and Arturia if I own native instruments for the price that gives me 19 synthesizers for the price of Omnisphere. So it depends on what you want.