I like Koren Publishing, and I noticed they have Bartenura and Kav V'Naki edition. I want to practice my Hebrew. I like a clean visual design, but also portability. What should I purchase? Any recommendations?
I recommend this set.
But I use this in everyday practice, because of a very good and large font, not tiring for eyes. You can take one in the pocket
I love it; it is clear and not expensive.
Koren have beautiful font, a good quality of paper, but is expensive.
Kav Vnaki is expensive and the Bartenura is little and not easy to read. The Kav Vnaki perush is not useful at all in my humble experience.
Oz Vehadar recently released a "Mishnayos Oz Vehadar 15 Volume set" set (link here).
I just bought it and it's excellent.