The Yammy 1900 uses the TI BB DSD-1791 Dacs.
And the Marantz 8002 uses the CL CS 4382a Dac.
Audyssey is more sophisticated and preferable in my opinion.
* But you know what DSANTI? You'll find out very soon what the 8002 is all about, then you can decide for yourself from your own set of ears.
You will make your final decision based on your personal listenig session in your own room, with your own Paradigm Reference Studio speakers (in this case, four Studio 20s, that you'll be using as your surrounds).
** The SR8002 is the top of the line from Marantz receivers.
After that, you have to go with their separates; so, you were right.
*** Do you really need pictures of the inside of your Yammy 1900, and the Marantz 8002, to compare these two? It's quite easy; just remove the top of your Yammy 1900, and have a peek inside. And when you receive the Marantz 8002, just do the same.