DAC's Streamer and Preamps

Generally- separates perform better by isolating noisy circuits from each other, and future upgrades easier to replace a single function component. However, it’s costlier with more casework and cabling.  Digital continues to evolve rapidly vs analog - a good reason for separates.

DAC with volume control- Generally, one can run the DAC without a preamp, but a preamp will usually make it sound better (more engaging, realistic…). 

But, there may be exceptions.  I moved from a separate steamer and DAC to a streamer/DAC because a used Linn DSM/2 w Organik DAC was a fantastic sonic bargain in the realm of top DACs.  I also moved from a separate preamp and amp to an integrated because the Audionet Humboldt offered reference top Sonics but within my budget.

Some brands make incredible all in one units, Lumin is one of them.  Streamer, DAC combos at various price points. All are great, have built in digital volume control.  If you plan keeping a combo unit for awhile, don’t really like to tweak things, great option.  From a flexibility standpoint, separates are the way to go, allows you to swap out DAC’s, easier to tweak, make changes.  So many options, depends on your budget and sound preference, matching gear.  Ability to replace a pre with a DAC / Streamer with volume control is really system dependent, works well with some amps / speakers but with others a Pre will generally make a noticeable improvement.  Schitt, Lumin, T&A, LTA (Areo), PS Audio, Chord all make great DAC’s with different design philosophies, R2R, Tube, FPGA, Chips.  Used is a great way to get more bang for your buck, good luck. 

I subscribe to the advice that a higher end system will benefit from a separate pre but not necessarily a separate DAC and streamer.  However, since I have not seriously looked at upgrading components for the last two years, I am not real familiar with the more recent all-in-one boxes.  I know there has been a big focus on volume control which has been a weakness in the past.  Especially if one is only streaming there is no question this option could provide the best value.  You should certainly consider it and let your ears and wallet be your guide.  I think the traditional "separates are always better" logic is simply not valid for everyone.  

You want a DAC that can keep up with the over 10K DAC’s?

Give this one a try:

I am a separate component guy, but, it will cost you more money in interconnects, power cables, and possibly linear power supplies, and you will need more space.  Of course components give you more flexibility for individual upgrades.  I am old school and always believed that separates improved the sound, but, in the medium and high end that may not be the case anymore.  I have separate preamp, monoblock amps, separate CD/SACD transport, separate DAC, separate streamer, separate LPS (s).  So, for example,  if I update my DAC, my streamer and transport will take advantage of the upgrade and my preamp does not need to be upgraded.  But, you already know all that...  When I started, Marantz Receivers were near the top of the line, so, integrated.... then separates were the rage, and now, integrated is back.  In addition, the old Marantz receivers are still considered good sound today.   So, I would say that today, either component or integrated can give great sound, just go with your needs and the best components you can afford.  However, as others have said, for volume control and other advantages, I am still a proponent of DAC to Preamp to Amp(s) - whether integrated or separate components.