KLH 5 includes some adjustability which I bet your current speakers could benefit from
"It has a three position acoustic balance control whereby the listener can dial up or down the speaker’s mid and high frequency presence to better match one’s listening environment. All Model 5s come with a 10 year warranty."
No speaker knows what space it will end up in, and, you may use speakers in various spaces. I’m a big fan of in-room adjustability. 3 optional positions is much easier to keep matched left to right than my vintage setup of L-Pads, wonderfully flexible but a pain to balance precisely. However, when you get it right, they are KLH 5’s customized for your space.
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To have some help, an inexpensive sound meter can be helpful, I just ordered one
https://www.amazon.com/gp/product/B07YS9442C/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
best of luck choosing,
Elliott