KEF reference with Uni-Q are nice clear punchy suckers. You could do worse. $599 seems a tad high for what they are but Ref 2's go into four figures.
4 responses Add your response
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 owned the Kef Reference One's (with the Uni-Q) a few years back. In the late '90's, I think the MSRP was $2100 or so - but, discounters were selling them around $1800. The sound is dynamic and a bit forward - making them great for HT and R&R. At the time, I powered them just fine with a Denon 2801 - 100 wpc. Actually, I biamped them off my receiver. The bass was just okay - not great. I'm not sure what a 'good price' for them now would be.