I have not heard the VR4 SR but going by the design... I see the VR4 SR has a tweeter in the back. I do wonder if it is genuinely a di-pole or really a bi-pole. Depends if they are running the rear tweeter in reverse phase or not. Either way, it should do a good job with making a deep and airy soundstage, but what you have is still essentially a box speaker. The transparency will depend on the drivers and their implementation... but I would say there is no better way to get rid of box colouration than to not have one! From what you have asked for and buying commercial products, a smallish pair of electrostatics with a pair of super-subs crossing over around 150Hz would probably be the ticket. Are you any good at DIY and electronics? I could give you a few pointers for a DIY speaker system that should hit the right buttons.