Hi, I am not sure how small they are but I just got the new Re:Coil soundbank from Pulsesetter sound (made for Omnisphere) and it is one of the best sounding pack I ever heard for synth sounds related to string instruments.
It is of very high quallity, like Heavyocity stuff in some way but from a much smaller company and at a much smaller price too! $30 intro price is a steal!
The power of Omnisphere is incredible and it shows here, as much as the talented sound designer of course.
I did not want to tell others at first to keep it for myself but since it is so good and you are making a post about this topic, might as well tell others of this gem.