Pioneer Atmos speakers and similar

Hi all, I'm trying to pick a set of relative inexpensive home theater dedicated speakers.  Does anyone here have experience with the Pioneer Atmos sp-ebs73-lr or sp-efs73-lr speakers?  I notice they are 4ohm speakers and my Marantz SR7011 is not even 4ohm rated nor is the Pioneer Elite LX-501 and similiar AV receivers. Any feedback appreciated.  Otherwise, anyone else use Elac B6/F6 or UF5 for home theater?  Any other suggestion within this price range?  Ideally I hope to pick something easy to find on used market and resale on used market.  Thanks all.