Sabai,
I have a highly resolving system. The SR speaker cells do a great job in adding a further 3D effect especially with vocals but compared to my true bi wairing set up, it ever so slightly looses speed,timing and dynamics with faster music like acoustic guitars. Having said that, the SR speaker cells is a step up if your speaker cables are lets say not up there with the best. Also the different MPC used will give you different presentations in the sound. You have to try them to do your own personal evaluation.
Finally, to keep it short, the PD MPS-5 is so good that it has stopped me from owning a XDS-1.
Cheers