OP, when you say "best" do you mean in absolute terms? or just in my opinion? I always thought Klipsch was a brand that tended to appeal to those who primarily listen to rock (i.e., loud with minimal compression).
The very best floor-standing speaker, without a doubt, by any standard, is a used Merlin VSM - which is not often thought of as a rock speaker, but I think does rock quite well, even though it only goes down to 30hz or so - how much rock music actually has deep bass in the recording? Unless you are listening to electronic, I'm not the deepest bass is an essential part of typical rock recordings. Aerial speakers are also the best.
The very best floor-standing speaker, without a doubt, by any standard, is a used Merlin VSM - which is not often thought of as a rock speaker, but I think does rock quite well, even though it only goes down to 30hz or so - how much rock music actually has deep bass in the recording? Unless you are listening to electronic, I'm not the deepest bass is an essential part of typical rock recordings. Aerial speakers are also the best.