Your not spending 100 on just a pump though. Your getting a timer, pump, Nozzles, ect. I don't recall what the Mistking starter comes with, but this one.
https://pro-products.com/pro-mist/
Pm50 not a bad deal. Comes with pump, 2 nozzles, tubing, ect. For 109, not bad.
I prefer MK nozzles, not because of the tips or the mist but all the moveable stuff to it. Idk that promist offers that, it says it offers their Point and Locks, which are nice, but mine didn't come with them (that was a long long time ago).
If it comes with the P&Ls, 109 is a steal. With 2 MK nozzles, and the cheap pump, + Tubing and all the other accessories. Your at what 70-80? 30 dollars more for a quiet more reliable pump would be a no brainier to me. I have the Pm50d it's silent. I have MK pump too, and nozzles and tubing ect from both.
I prefer Promist tubing, though I use MK on black cages. PM tubing is softer easier to move, easier to route, just feels nicer. MK tubing feels like the same stuff you get in the garden center at Walmart.
The nozzles, are a tie, they perform about the same, again the black I like, though soon I will be doing some white Vivs, and will use PM Nozzles/Hose.