I have had my R700's for about 6 months now. They are easily the best speaker I have heard under 5-7k a pair. My feeling is purely subjective based on what I have heard. There have been quite a few comments that Ring Radiator Tweeters in these are likely too bright. I run mine with about 5-10 degrees of toe-in and there is not a hint of sibilance. I am absolutely floored by how good these speakers sound. I agree with the previous posters that you have to come correct with the power though. I am running them off of a Rotel RB-1070 and I feel they could use a bit more power. Even with the 170 or so watts I can pull out of my amp, the detail is incredible without being shrill or harsh regardless of the volume I have pulled from them. These are my endgame speakers at least for now.
I do have a complaint though, while I completely understand and agree with the pricing for performance on these which is completely ludicrous IMHO, the finish is cheap. I am really struggling with the vinyl wrap. The wrap looks nice but let's be honest when does a vinyl wrap ever say quality? I am really close to pulling the trigger and just refinishing them with a solid veneer. I upgraded from Linton's but I have heard quite a few speakers from Focal, Magnepan, Klipsch, KLH model 5's (i have not heard the Kendall's which is a more close comparison FWIH), Focal, and KEF. The R700's for my tastes beat them all. The r700's had a bigger deeper stage than all the others. I didn't hear the other speakers in the same room though and that would likely make a big difference in itself. The Focal's were the closest quality wise and were more airy but had WAY too much energy in the top end for my tastes.
I have a couple of pre's that I have tried with the Polk's. I am currently Running an NAD M12 which I prefer over the Freya+ with upgraded tubes and a Pontus II DAC. I don't use the Pontus II with the M12. I feel the R700's sound better using the internal DAC on the M12.
I am sooo happy with this purchase. I still love and have my Linton's and they get quite a bit of use in my bedroom setup, but the R700's are way better. If you have the room and the power, I highly recommend giving these a shot.