As i have already mentioned, Void is a relatively young firm.
Since you are in the UK you should be more aware of the Void brand than the rest of us.
And yes, Stasys 3 CAN compete with Funktion one and Turbosound boxes.
They all have their own characteristics but if we are talking about the sound quality they are at the same level.
Turbo TDX line uses P-Audio drivers and are way lower level than Void Stasys3.
Google a bit about Rog Mogale. He has quite a history in audio engineering.
This is like saying that Eona Audio products are bad just because you dont see them on the riders.
Also visit
www.speakerplans.com (the forum) for more information about Void products.
Also i was answering to the OP about the system that is suitable for his needs. Look his other topic about the system he is trying to get.
Happy New Year to all BTW