Qiyi.
I have had the Moyu (2 ones XD), the Dayan and the Qiyi.
The Moyu is very smoth, with a soft clic and never pops with tight tensions. Is not very fast, so its very controlable. The problem I had was that if you aren't very accurate it lock up a bit because of its lack of corner cutting. Don't missunderstand me, the corner cutting isn't bad, but could be a bit better
Then the Dayan... its horrible XD I mod the center pieces to make the holes bigger to improve the corner cutting and reduce the pops (it pops a lot) and now is much better, but I hate the tips, they doesn't stay on place and for me are the worst problem of the puzzle. Don't by this pyraminx.
Finally, the Qiyi. It's super fast, a bit more clicky than the Moyu one, but not too much. The tips require a little more effort to start turning, and thats perfect for me because now I never turn them accidentaly. The corner cutting is much better than the Moyu and never pops. If you want a softer click, you can adjust the ballbearings, even you can adjust the tips, because they have 3 ballbearings, the click makes softer by taking apart 1 or 2 of them. And it comes in stickerless and I love stickerless cubes.
That being said, the Moyu is a great option too, and problably better for a beginer because is more controlable. But I suck at pyraminx (8-10 seconds) and I had no problems with the speed of the Qiyi.