HI Alex,
I'm far from an audiofile but iv listened to both the wf 35s and the rf 82 iis and there is no comparison in sound. The RFs offered a much larger sound stage and deeper, richer bass. The WFs on the other hand are very nice to look at and have a much smaller footprint than the RFs but your room seems quite large so i wouldnt even consider the WF 35. As far as your receiver goes, it is plenty powerful as Klipsch speakers are extremely efficient. IMO i would go for the 82 iis or if you could pick up a used pair of RF-63s they would fill the room nicely.
Dan