Upgrade from Revel 228be?

Yamaha NS-5000 would be my vote. $15K new. Their driver technology is ahead of everybody else. Only problem is they need at least 200 watts for their 3.5 pound woofer coils. 500 watts are better. 

The coherence from the 3 drivers made of the same material is unique to cone speakers available today. No one else can claim that. The 12 in woofer is made of the same material as the tweeter and mid-range. This speaker can also rock or sound great with soft music.

I owned the Revel Salon 1 and have heard the Salon 2 a few times. I have also heard the Paradigm Persona 3F, 5F, and 9H (2x). I think the Zylon material of the NS5000 drivers is better sounding and just as detailed as the Beryllium of the Reval Salon 2 and the Persona's.  No fatigue on the NS5000.

It does need some power. Though other owners have used low powered amps on it. I use a CODA #16 which is a very powerful beast.

I posted this link on another speaker thread.

Yamaha NS-5000PNST 3-Way Bookshelf Speakers with Stands | Hi-Fi Heaven (hifiheaven.net) ($9,599)

All good choices. If you can, try and audition if possible. 

I went from the 228Be to Focal Kanta 3 which was a big improvement for the things I value. The Focals (especially using Gaia footers) image much better. Even though their cabinets are less inert than the Revels, they sound like speakers with heavy, solid cabinets. Imaging is precise and focused. They sound great a low levels. There’s also more treble information, and a slight warmth to the presentation. They’re also very easy to drive. Unlike many of the speakers you’ll be looking at, you don’t need to go nuts in amplification, in price or power. If you don’t value these things, it could be a sideways move. Bass is just OK (not bad, just not spectacular in any way). Being front and rear ported, they’re easy to place in a room. Overall, I found the Revels to be somewhat boring in comparison, not as musical. I listen to classical and jazz mostly.