Best speakers for $300/pr

I have a friend who has owned KLH 6’s for lo these many years.
He wants to upgrade.  He’s getting a new Marantz receiver and doesn’t want to spend more than about $300 for his speakers.  Can he get anything decent at that price level?
There are many popular speakers I can think of that retail for $400, but for $300(new), the Elac Debut 2.0s are probably best. 
Seems like the KLH 6's were $250-$300 when new. How much is that in today's dollars? IMHO, $300 will get something different for sure, but not likely an upgrade. Since he has had them that long, are they just sitting on the floor or sitting on a short tilted stand? Is there a problem with them that needs repair?
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