Minecraft: Server hoster, Nitrado or Zaphosting?

I would like to rent a Minecraft server, hence my question: rather Nitrado or Zaphosting?

Nitrado is expensive and you pay for every slot. Zaphosting has rather sluggish support and occasional failures and you also pay for 10 slots, e.g. Always. I would rather recommend a hoster where you can set the slots yourself and which is also a bit cheaper. For example host unlimited or something