Hi, and welcome to ASR.
The K11 is an R2R dac. A very old fashioned design which typically don't perform well. There are some recent releases that do OK, but this particular model is specified as THD+N of 0.025% which is equivalent to SINAD of only 72.
The DS100 I can see no measurements.
There have been hundreds of DACS from all price ranges measured here. As
@LTig states, just choose one of those from the blue/green sections of the SINAD chart with the price and features you need.
(Go to the
audio review index, select "audio electronics" then put DAC into the search box. Sort by price ascending. Find one in your price range with a SINAD of at least 100 (for me I would say 80), a "yes" in the recommended column, and the features you need). Check out the linked review for other measurements if you want.
Feel free to come back here with your shortlist to ask for further comments.