Thanks for your help all, went with the Steinberg UR22MKII.
The KA6 looked nice, and some had said sound quality was better, but reviews were overall very mixed. I like the big volume knob, but whatever. Also I had heard reports that KA might have been slightly lower latency, but IDK.
Ultimately, I chose the Steinberg because of less overall reported issues (people said it was rock solid) and stable drivers. I couldn't justify spending almost 75$ more on the KA6. Seemed pretty neck and neck. Were they the same price, may have gotten the KA6, but eh.
The only think that gave me pause was apparently the UR22MKII doesn't do direct monitoring in stereo, but if I understand correctly, I don't think I'd be doing any real time monitoring (that's with inputs, right?)
Hopefully it'll be a good addition.