Best Loudspeakers for Rich Timbre?

I have to say, if you mean truth of timbre, or closer to real sounding in the mids, the new Revel f 228 be is outstanding. Check out the technology and measured response of these speakers,  truly impressive. The best I have had in my home, and will put far more expensive speakers to shame. They are something special when set up properly. 

@Sciencecop - your posts often contain a confrontational tone, frequently belittling anyone who doesn’t love Magicos above all else. Take a breath and relax. You are a Magico Fanboy, we get it. I’m a Boenicke Fanboy and proud to admit it and don’t know or care what the measurements say or the science says, I just use my ears. And to my ears Harbeth and Boenicke and the ProAc K6 all sound better for my home-listening tastes than the Magicos I have heard (A3, S1 ii, S3 ii, M3).

If you can find a dealer you should have a listen to the Gauder Akustik Darc series. These German speakers were launched at the Munich hi-end show in May and sounded a lot like a Magico. Not surprising given they are built with a sealed and ribbed Aluminium cabinet, so I guess they were inspired by the success and sound of the Magico. With the diamond tweeter option used at the show they were very impressive - they had the essence of the Magico - the complete transparency and detailed resolution which is always impressive, but they sounded slightly different too...better maybe? Still not to my home-listening taste but impressive nevertheless. The top German hi-end hifi mag gave them a 100% rating which is something they have only ever given to half a dozen or so other hifi components ever (German hifi mags seem a lot more honest than the UK and US magazines which seem to just praise absolutely everything they review, whereas the German mags are often critical of the products they review).
https://www.gauderakustik.com/index.php/en/loudspeaker/darc-en

@fleschler 

pulp and paper cones are outstanding - beautifully damped, stiff and light weight. They must not be driven in to breakup - so the operating bandwidth is less than more rigid cones. Provided the designer operates the cone within its ideal operating bandwidth then paper/pulp cones can be world class and as good as anything else....

@duckworp
I am a Fanboy of good engineering. Unfortunately, in our hobby, and particularly high-end loudspeakers, they are hard to come by.
  
BTW, I travel a lot to Europe, and I am familiar with the foreign audio press. Don’t kid yourself; they are just as “colored” as the one in the US; try to find a bad review of a high-end German product in a German magazine, or a UK made one in a UK magazine, good luck ;) 

After weeks of waiting I finally got to visit The UK Audio Show 2018 (Woodland Grange, UK) at the weekend. They had some impressive speakers there including the curvy, strokeable Vivid Kaya 90 - amazing dynamics, scale, imagery and dare I say it, the merest hint of metallic tinged timbre? There were many other designs such as the organic sounding large bookshelf Audio Notes (AN-K) and some small bookshelves in the Malvern Research Audio room filling the room with Abbey Road via vinyl/tubes which begged the question - where have you hidden the subwoofer? The Arcadis EB2s sounded impressive and clean but a touch thin until I sat sightly further back. Then the sound became satisfyingly well balanced.

It was a thoroughly enjoyable show with plenty of tea and coffee stations close to hand. Many of the dealers and designers were willing to take requests to escape the usual tinkly piano Jazz. So we got to hear the Beatles (Norwegian Wood, Girl), Beethoven (piano), Donovan (Sand and Foam), Steely Dan (Babylon Sisters), Diana Krall (Temptation), Peggy Lee (Fever), Dire Straits (You and Your Friend) amongst others. Sources included vinyl, CD, and quite a lot of streaming via phone. All of them sounded good, with vinyl often sounding close to CD, clean with very low surface noise.

As good as the various designs were there was only one loudspeaker there that left me unable to find any fault sonically, and that was the Kerr Acoustic K320 (https://www.kerracoustic.com/k320)

Presented in a garish blue firing down a fair sized room, about 10 x 5m with a large window behind them, it was simply delightful in the way they played different genres of music - with all the tonal/timbral colour intact. They remained engaging and surefooted throughout the entire frequency range at both high and low volume, and had probably the cleanest treble I have ever heard from any loudspeaker.

Just a beautifully attractive colourful sound. Easily the best in show for me, and that included it's bigger brother the K100 which I felt was reference quality impressive in scale and dynamics (reminding me of the Naim Ovator 6000) but altogether more monochromatic than the always enjoyable K320s.

In fact I can't say I have ever heard a better sounding or more enjoyable loudspeaker at any show, and that includes Avantgarde Trio's and the similar sounding ProAc Future Ones.