For a room that size and for the music you mention, I would highly recommend looking into the Vivid Kaya 25. It has the speedy performance of a high end bookshelf with better bass extension through a bottom firing port. They are slim and easy to move around, and you will have the right amount of space for the air they need around them. You may be surprised at the way they charge the room without bloat, and you may not need subs. They deliver higher resolution and fidelity with lifelike presence and holographic imaging, and they won’t be as beamy as KEF.
I wouldn’t characterize them as warm, though, but to me Vivid speakers are as natural and transparent as they come. They will tailor around the amplification they are paired with, and they are not hard to drive. So if you want a warmer sound, pair with a good Class A solid state or tube amp and you’ll be set.
I am a Vivid Audio dealer, so take that how you’d like, but I’ve tried everything from the small Kaya S12 (which I use very near field in my home office) to the Giya G1 Spirit, which I use in my reference system.