@samandhi , when you are referring to the Symbio tips, do you mean
these?
I am currently using the SpinFit CP100+ together with the KBEAR Rhyme cable. Listening to Amazon Music Unlimited through my Qudelix 5K, LDAC. The result is amazing for me! What truly impresses me, though, is when I am listening to YouTube [Vanced}. I use it to discover new music, and because the DJ sets available there, are not available on Amazon. It feels fantastic immersing into the sound and forgetting everything else! It's truly awesome!
I haven't used the stock cable much but what I recall is a thinner sound, much treble and not feeling the base. Perhaps, maybe for sure, it was because I've used it just in the very beginning, prior to burning in. I would give it another try but it doesn't worth it for me, because my Timeless are meant to be used with my FiiO UTWS5. So, very soon, I will disconnect them from any cable.
Tips are more important to me. The sad thing is that these tips are not available on Amazon UK. These Symbios, for example, are currently unavailable. Similarly, it took more than one month for my CP100+ to arrive from AliExpress, same for my KBEAR Rhyme. It becomes exhausting, after a point.