Yeah, that intro is beautiful. Love the way you tie all the elements together. The mixing seems pretty on point. For quality vst's I'd suggest probably Kontakt as I know there are some real quality Kontakt instruments out there. It is a bit processor heavy, (at least for me anyways..). They offer a free Kontakt player with a few sound libraries in it, but if you wanted to expand that library without getting the full version they limit you to something like 30 minutes. Another option if your just looking for some free VST/orchestral sounds is VSCO
VSCO Community They offer a whole bunch of free orchestral patches for a plugin named Sforzando. I just recently got these but haven't loaded them up yet. They've got some demo's on that site though, maybe you'd like to check them out!