orchestral libraries

I'm trying to decide on an orchestral library without spending much more than 1K. I'm down to SSL, GOS, and VSL Opus 1. Any thoughts? I've been having an especially hard time getting opinion/reviews on Opus 1. I know it's larger counterpart (VSL) has kind of become the grandaddy of them all, but info on Opus 1 is a bit more scarce.