Your Denon should be able to tear these to shreds (not familiar with the Yamaha).
I've owned the Ref III.2s but thought the design sort of dated.
For the money you're talking about, I'd look at the B&W floorstanders recently reviewed in Stereophile for around $1000 (list).
If you must have KEFs (I own two non-Ref uni pairs and a Q9c center channel), I'd go with Ref-IIs -much better design than the ones...
I've owned the Ref III.2s but thought the design sort of dated.
For the money you're talking about, I'd look at the B&W floorstanders recently reviewed in Stereophile for around $1000 (list).
If you must have KEFs (I own two non-Ref uni pairs and a Q9c center channel), I'd go with Ref-IIs -much better design than the ones...