best strings ensemble

I'm searching for a VSTi with very good and realistic strings ensembles... I've used Motu Symphonic Instruments (under Cubase) until now, and I'm quite satisfied with its sounds for many instruments but NOT for strings, especially ensembles...
I was thinking about these:

- Vienna Symphonic Library "V03 Orchestral Strings 1"
or
- Vienna Symphonic Library "Vienna Special Edition PLUS"

Does anyone know them? Are strings really very good?

thanks, Andres

Check out Synful - http://www.synful.com .  It's very interesting because, unlike most of the others around, it is not sample based.  It's also very expressive (as you will hear on their demos).

Thanks, it seems very interesting...