That's a good choice. In my rig, I installed an a/b rca switch. I feed the Wiim ultra line out into A, the Fiio K13 R2R into B. Two of my friends who aren't audiophiles stopped by and while here we walked through a bunch of songs. Asked them to describe each. They said WU dac is clear, precise, brighter. The K13, they said warm, relaxed. Basically, it's like having more than 1 flavor where you really like both, and enjoy them in different ways. For me, I love the K13 for non-critical listening and/or long listening sessions. It has that vintage analog feel many chase. There are no wrong choices, it's just what you enjoy and sounds good to you. Don't let anyone sway you. Listen yourself and do what makes you happy. Have fun!