Compatible Speakers for a Coda

I have a Coda CSiB integrated that currently runs my pair of Revel F52 and SVS SB Ultra-13 Sub.

I want to upgrade my speakers and I'm looking for ones that are a good match with Coda. It is configured to put out 400 watts at 8 ohms and twice that at 4 ohms.

Was looking at the Legacy Focus SE or XD. They are supposed to be a good match with Coda. I do want to give a higher efficiency speaker a go. 

So what other speakers in the $10,000 to $15,000 original price range would match well with the Coda Products?

I'll be buying used.

Thanks for sharing your knowledge and suggestions.