What is your budget? That's the most important thing in recommendations. I personally will have friends get the Codex DAC/headphone amp and have them run it directly to the amp unit they can afford a good preamp. The Chord Hugo 2 is another good DAC, but costs more than the Codex which is 1800 list. The Marantz is about 2800 online. You can get a nice streamer for 500 or so. Digital is changing so much and that's why i personally go for separate units so you can upgrade as needed or as you want and not get clobbered as used digital usually goes down in value much quicker than anything.
I agree that the Marantz unit isn't up to the same speed as newer DACs'.
That said, do you even have music that is more than 24/192? I highly doubt that you do or will during the life cycle of this product. It will do native DSD, which you may or may not have, but it doesn't list the specs. I'm sure it's the lesser of the playback specs though.
For the money of the Marantz, I personally feel that you can get much better quality, but it will be in a couple of boxes. YMMV
I agree that the Marantz unit isn't up to the same speed as newer DACs'.
That said, do you even have music that is more than 24/192? I highly doubt that you do or will during the life cycle of this product. It will do native DSD, which you may or may not have, but it doesn't list the specs. I'm sure it's the lesser of the playback specs though.
For the money of the Marantz, I personally feel that you can get much better quality, but it will be in a couple of boxes. YMMV