You would definitely notice a real change in sound.
Klipsch are forward, energetic, "in your face" speakers, IMHO (I chose RF-82 ii and RC-52 ii for my HT). I think they make good Rock speakers thanks to their energy/attacks, but ultimately miss a bit on accuracy if you compare the sounds of acoustic instruments/voices with live.
The Elac B5 I heard was the opposite, sounding dull in comparison to the AA Monitors (which I consider to be largely neutral/accurate).
I also consider the Pioneer FS52 to be a forward sounding speakers (although not so much as the Klipsch).
I hope that might help you decide if you should try them; however, either way, I think it would benefit your ear and quest for your next speaker to give them a trial for a couple of weeks in your home, because it represents a different approach. Just give them some time and listen to a variety of music.
I believe you can buy them from Amazon with a 30 day return policy (return shipping is paid if you return them).