A lot depends on how in love you are with your current speakers- especially if what you are mostly looking for is better/deeper bass. Floor standers will probably give you that, but not by a huge amount because there will still be only two of them. When it comes to bass what matters more than anything is having at least four widely spaced sources. So you may want to consider adding four subs, also known as a distributed bass array, or Swarm in this case. https://www.theabsolutesound.com/articles/audiokinesis-swarm-subwoofer-system/
But if you are not that in love then you just need to do what you already know and search out as many contenders as you can find to audition.
But if you are not that in love then you just need to do what you already know and search out as many contenders as you can find to audition.