If I can suggest you a place where to record the next MIR room, I would suggest some industrial places, like an abandoned factory or some old factory offices. While VSL libraries are mainly made for classical music, they can work very well to prototype more contemporary works. And sometimes, small ensembles or soloists are placed in 'futuristic' places for particular performances in modern (even if a bit extreme) productions.
Considered how your logo is inspired to your fellow citizen Fritz Lang's sci-fi imaginary, and how Vienna is housing no few avant-garde theatre and performing art companies, maybe this could be in line with your production. Having a way to place soloists on a mezzanine or a scaffold in a big empty building, or a more modestly sized workshop, or some ageing office with old solid wood furniture, would allow for particular prototyping or radio-drama productions.
This would also be great for external acoustic sources, like actor's voices or real soloists.