My Friend's recording of this piece using much more high tech equipment is here:
http://www.box.net/shared/1gcefo7f0v
If people are still interested they might like to hear this.
He used:
Viola is VSL
Piano is Kawai EX Pro from AcousticSamples
Reverb is Altiverb Todd AR recording stage ER and Aether Piano Hall tail.
He's trying to point me more in the direction of production music libraries (he thinks it could work in a TV drama) whereas I've traditionally put the emphasis on the score.