The same results i got Blueorb I loved the B&W 684's with my Arcam Alpha 9 set up but the RS6's beat them which surprised me!
The 684's are a cracking speaker, really big bold sound, but a little too big and bold with the Arcam amp. I am sure if they were paired with something leaner, they would have been great.
I found the RS'6s just so much more refined than the B&W's, better integration and far more detail while still maintaining a good tight bass. In fact, the depth of bass surprised me for such small boxes, Unlike the large B&W's which look like childrens coffins!!
Anyway, it's all subjective I guess.