Do I Need a Dedicated Streamer?

Logic dictates that your source be at a commensurate level with your amp and speakers otherwise it is the weakest link in the chain and will not maximize the amp and speaker’s sonic capabilities.

Just set aside all the comments here and think through that for a bit for yourself... you spent big money on your rig so far for a reason, you wanted the best sound you could afford, so don’t sell your rig short.

Here are 3 excellent streamer choices at ascending price points that have internal DACs and USB outputs so you can utilize your amp’s internal DAC as well:

Eversolo DMP-A8

Lumin T3

Aurender A15

Phones r good as remote controls for dedicated streamers. 

I suppose that I could wire my mac mini using a usb cable to my Hegel and get streamer level quality without buying a dedicated device?

Try it. What do you have to lose if you already have the Mini? I've used this setup (with different amps/DACs) and it works fine.  You can host Roon Core on a Mini (or other full-function computer) as well as Audirvana or (of course) Apple Music.  Turn off Time Machine (or schedule it to run at night) and other process that might interrupt the music stream.

In my opinion, your choice of streaming platform may be best dictated by the services you want it to support and how you want to control it. With a full-function computer (like the Mini) you have many options.  After you've experimented with a few, down the road you might want to add a dedicated streamer.  If by then you've decided (for example) you like Roon, you can focus on Roon-Ready streaming devices.  In that case, one of the Rendu products would be an option;  Aurender (at this time) would not be.  

@danb99 

I'll leave the dedicated streamer thing alone since it has been discussed ad nauseum. But I think your consideration of Iso gaya I feet is one to pursue. I just installed them under my PBN MONTANA XPS speakers and the result was nothing less than stunning. Mainly in the very low frequencies, they have tightened the bass considerably getting rid of any kind of rumble anywhere in the room, even in the back corners, while losing none of the punch. Also the presentation has overall become more precise and a tat brighter. A very significant upgrade for under 1k.

@danb99 

Another vote for the blusound N130 with an external LPS. Bypass the nodes internal DAC.  This combination is quite good and the BluOS app Is really good too. Good luck!