I have owned Dynaudio C4's also for close to 10 years. They have given me a lot of enjoyment. But for the last 2 years I've been on a similar search. I want something that's more open, less veiled. The big Dyn's can be a bit slow sounding at times, and I just don't think I'm getting everything out of my system I could with them.
Over the last 2 years I've logged 10,000 miles of travel to RMAF twice and Newport Beach show, as well as a few of the big dealer showrooms. If I told you about everything I auditioned and what I thought it would be an hour of typing.
There are a lot of strong contenders out there. In 2012 I heard for the first time the speakers from a company called Vapor Audio, and was thoroughly impressed. But their biggest speaker at the time I didn't think would be enough for me. Then at Newport they released a big speaker called the Nimbus, and that really got my attention. RMAF last year they had a big room and 2 new big designs. With Wilson right next door to them, it was easy to go back and forth to compare. I honestly liked the Vapors better, at about 10% the cost. They're certainly worth a look. Only downside is they build to order so you'll have to wait a few months to get your speakers. But I plan on taking these to the grave!