On a lark I decided to use Jay Bacal's MIDI file of John Williams' "Adventures On Earth" that he created for Vienna Symphonic Library to help me create my GPO4 orchestral template. I did not go through any effort to alter his MIDI controller messages, nor did I try to use GPO's legato functions. I just wanted to see if I could create an acceptable orchestral blend using a very simple sample set.
I used four instances of GPO, one for each instrument family (strings, brass, woodwinds, percussion). This allowed me to tweak the reverb settings (just using GPO's built-in reverb) to place the instruments in their correct location in the virtual hall. The ony non-GPO effects were Sonitus EQs (one per GPO instance) and some compression on the master bus. For a $150 sample library I think it's pretty incredible...or am I just kidding myself?