Marantz is an excellent recommendation. I'd love to hear from someone who's heard the Ruby K1 and SA-10 side by side; the Ruby may be the sweet spot.I have the SA-KI Ruby. When I was researching I couldn't find any comparison to it vs. the SA-10. Even the specs of the two on the Marantz website are apples to oranges if you want to compare (IOW different specs are listed for each so hard to compare).
Physically they are almost identical except the 10 has balanced outs, the 10 has a copper shielding around the power transformer, the 10 has many filtering options where the Ruby has only 2. There may be others but I didn't uncover while researching.
I can't imagine they sound very different but I dunno. Seems nobody else knows either.