Update in loudspeaker seeking: I bought a pair of brand new klipsch rp-160m on low price.So I tested and compared to-with my polk se20.
First listening: out of box was not bad but the woofers needed to break in and the tweeters also turned smooth after a really short period.
I used the isotek full system enhancer on the first afternoon,about 3 hours.Then begin the tests with movies,concerts,YT,audio cds.
Oh man...this is a diamond 11.2 but pumped up with some testosterone and refinement

The bass is room filling and digs deep but not missing the upper bass..thanks to the 60-120 Hz lifting it is very pleasant to listen.
The ES20 goes deeper but the klipschs kicks more and I feel that the klipsch has flatter roll of under the br tuned freq,so not true but I like better.
The ES20 is good..softer..but missing the kick.
Midrange: The ES20 pushes the vocals in your face,on higher levels sometimes too much.The klipsch is calm but lively,I enjoy the midrange of it.
The female vocals not so strong as the ES20's but clear and detailed.At movies the dialogs very good on both loudspeakers.It is also important to me.
Trebles: the ES is fine and smooth,I like its treble but not as opened as the klipsch.The klipsch is lively,the cymbal is cymbal,at concerts You feel that
You are in the first lines.
I was afraid of the klipsch because of comments,reviews,etc..but so good!The ES20 is soft where the klipsch gives meat and feelings.
Strange but true.
The sensitivity of the klipsch is about 86-87 dB/1w/1meter - it is based on my subjective setup and compare to the es20.The ES20 is louder about 2 decibels at the same volume position.
BUT!If You give a little power to the klipsch - it has really great sound,it shakes the sofa under me without sub or tone controls.
Important: at low level listening the ES20 great but enhance the midrange,the klipsch is more enjoyable-better tone equal.
High levels: the ES20 groove mids,I recommend to low or mid volume levels.The klipsch stays "calm" but kicks You out from your trousers.
Build quality: both are entry levels so..so.. The polk is better a little bit: the vinyl on the klipsch back at the terminals are crumpled.The grille is also better-tighter on the polks.
Terminals: both good quality,tight for my banana connectors.
Verdict: I love my polks but I like the klipschs better tonal balance and opened trebles.The polks has wide dispersion but the klipsch has very very wide sounstage,I like if the sweet point is big or could enjoy/listen the music in every positions in the room.
Polk: modern,fine and soft Klipsch: old-fashioned,friendly,pleasing but if needed hits like a hammer.
Tested on pure stereo system (marantz pm7005 with cd5005 )in a 4,5x4,5 m room without sub,tone controls.
My permanent test materials: Pink Floyd - The Wall (movie and cd) , Mike Oldfield - TB II (movie and cd) ,Yanni-Live (2006 movie)
Roger Waters - Amused to death remastered, Masters of Classical music (US series) , Twin Peaks OST , Loreena Mckennith - Elemental ,
Mike Oldfield - Amarok , Pink Floyd - The Dark Side of the Moon, The Endless River , Juliee Cruise - The voice of love , George Michael - Older ,
Moby - 18 , Sarah Brightman - Dive , Schiller - Tagtraum , Leonard Cohen - Dear Heather , Ennio Morricone -Concert live , etc.