I need some advice

I heard the Moon 791 + 761 amp with the Paradigm Persona 9H. It was a bit bright but that can be tamed with a warmer amp. The 761 would actually be great on my Yamaha NS5000 speakers. A warm-ish amp that would be incredible on the 5F is the KRELL Duo 175XD. I owned this amp and it was buttery smooth with good details. On the bright Persona it would sing.

My CODA #16 would also be good on the Persona, but I think the KRELL’s extra warmth wins out. The only issue with KRELL is that they may no longer be in business. Stil I would get an used 175XD and if you need repairs ship it to George Meyer in Los Angeles. They do KRELL and KRELL even sends their gear to Meyer if you do not want to ship across the country.

If I were starting from scratch, I may get the 791 or 891. I would definitely advise a friend to get that if all they want is music not so much gear headaches. 

I felt my much cheaper Benchmark HPA4 preamp and Schitt Yggi+ OG DAC were better than the 791. Not by much but those 2 components are exceptional in delivering what I like in sound. The 791 was a little more tamed down.

I also use a Sonore Optical Rendu to stream (have 1 set to sell, and 2 others). I think fibre optics is ALWAYS better than Ethernet as used in the 791/891. However, there are a lot of pieces in my setup compared to the tidy and almost as good Moon unit.

I have an Oppo as a transport. I do not use the DAC in it and instead extract the DSD and PCM layers via HDMI using a GeerFab D.Bob. Funny name but it sounds great. The output from that goes by SPDIF into my DAC. 

At the price of the Mooon 891 I’d be looking at separates unless you’re extremely space constrained or really want the convenience of one box.  Being beholden to one manufacturer’s streamer, DAC, and preamp is a big commitment for three critical components.  I read one review that had high praise for the preamp and DAC but found the streamer a bit lacking by comparison, which points out the risk of putting all your eggs in one basket.  It is clear there’s room for huge improvement over what you have now, and if you share your budget and what improvements you’re looking for and what sound characteristics are most important to you you’ll get some good recommendations here. 

I found a used Moon 891 for about 16,500 or so so when I was looking for just a streamer I was in the 5,000 to 6,000 price range and as for what was needing in my system the Oppo is great as a player but the preamp section sometimes is bit lacking as for sound I like all accurate reproduction tight bass as most people say the personas are a little bright but if the recording is good I don't find them to be bright .I really want to get into streaming and want it to be easy to use when I get time to listen to music I just want to turn the system on and enjoy the music.