I have heard the Focal 906 and had the Focal towers in my room for about 2 weeks. I compared them against Fritz Heiler’s Carbon 7 Mk 2 SE and they were not nearly as musical, though the towers threw out a much wider sound stage (because they’re towers).
I cannot speak to Revel’s sound, but I did eventually settle (after hearing Martin Logan XT 60i and Dynaudio Evoke 30 towers) on the Ascend Acoustics Sierra Towers with RAAL tweeters. Really an amazing company (small, engineer founded and run, very effective customer service). That tower is now at TMR for about 2/3rds the price.