I actually used Vienna for a phase, but was unsatisfied with the sounds to be honest. So far, EWSO has been the pinnacle of orchestral VST's I've found. Haha, well, the thing is that the sample size doesnt' really mean you have direct use of all those samples, they are all interwoven together in complex ways, based on pitch and velocity, vibrato, tremelo, different styles, all kinds of stuff.
ANyways! What do you think of the music though?