Alternatives to Marantz Model 50/CD50n?

I own the Marantz Model 50 and CD50n. I like them a lot. They fulfill a very specific set of requirements and do it well--better than the price point might suggest. But I'm wondering if there is anything else I should try.

I know there are loads of options in other configurations/specs, but are there any other options out there that offer the following:

1. Two-box solution. No more. No fewer.
2. HDMI Arc. I know this rules out a lot of great options. C’est la vie.
3. Complete Integration. One remote. One power button. Etc.
4. PCM 32/384 and DSD256 via at least one input.
5. Wifi and Airplay.