Should I get the Moon 891 streamer/dac/preamp for my Moon 861 amp? Or separates?

I have a 791 - prior to it I owned a 390. I have been very pleased with the performance and support from Moon when I have had questions. I was having issues with drop outs - it was a modem issue.  He called me after I shared logs from the MiND app and guided me through troubleshooting to get to the root cause and followed up with me a week or so later.  There are many great audio companies and my experience with Moon has been excellent from service, upgrade promotions and the sound.  

Enjoy your journey. And I am jealous of your amp. (My amp is an 860A v2.)

dman777, I have pulled the triger. I am expecting the 891 in the next couple of weeks. I was not able to demo the 891 in my home and in my room but I did bring home the 791 and it was excellent! My biggest concern was the phono section. In the store I was able to compare the 610LP with the phono section of the 891 and I did not hear any difference. Both are dead quite phono sections with crazy good dynamics. Excited to hear the 891 in my system. 

FWIW I auditioned the moon 891 with a 761 power amp. I held the rest of the system fixed, namely the Wilson Watt Puppies (50th anniversary) and compared it to the Moon 791. The difference is significant. The noise floor is so much lower that even with the 761 you can tell the difference. That was good enough for me to upgrade to the 891. This is perhaps an unusual comparison because the usual comparisons I see are 891/861 to 791/761. But for those (like me) who can’t fit the mammoth 861 into their rack this might be useful. 

What is the streaming service?  Stream files as well?

My 891 is being delivered from my dealer today!  It will be paired with a D'Agostino S350 feeding my Watt Puppies. Excited to fianly hear this unit in my system.