The R3s sound fine at lower volumes. Sounds like you are trying to fix your sound with gear (unfortunately a common misconception in Hi-Fi). It’s time to do some reading and learning, otherwise you‘ll always be lost chasing after something you can’t even properly describe.
First of all: all bookshelves need a sub. No matter what the specs say or what you hear in reviews, every bookshelf will have a massive gap at the lowest frequencies.
"Big soundstage". The soundstage you get, from any speaker, is 90% based on speaker positioning, including your own positioning (where you seat).
"warm signature better suited for electronica", unfortunately doesn’t make any sense at all, as that statement is really based on nothing.
Not trying to get at you here, just letting you know before you go chasing inexistent gremlins in your audio.