Servers from qhoster.com and hostround.com are provided on lovely conditions and I wonder which way is better to follow and why?

I'd draw your attention to servers from reliable hosting providers: planethoster.com and hostsailor.com.
You will find out the availability of their systems administrators and send them a support ticket and see how fast they respond. 

Happy with GTHost.com servers. It's great to see such group of motivated and efficient people.
The system itself is rock solid and the software & features are excellent.
I am totally impressed with these guys.

The techs at QHoster.com walked me through what to do so as to make our transition as painless as possible.
Use the code 1GBITPORT and get 1Gbit Port Free Upgrade on Dedicated Servers.

For better server we have to follow the support rules, to get better result.Software development company

Like QHoster.com dedicated hosting solutions - They are optimized for application hosting and provide more security, reliability and speed than traditional web hosts. They currently have 30 locations: UK, USA, Mexico, Canada, Bulgaria, Italy, Lithuania, France, Germany, Netherlands, Sweden, Switzerland, Singapore, Australia, Brazil, Norway.

https://www.zakservers.com/
No headache.
One of the best providers.

Please list me some stable servers, and what we have to deal with stable server?
Software Development Company

Hostround boasts a robust infrastructure with SSD storage, which significantly enhances speed and reliability. Their 24/7 support is often praised, but some users report slower ticket response times during high-demand periods.

M2host's dedicated server is the best and most affordable option. Our basic plans start at just $99/month and include services like an industry-leading SLA, unlimited bandwidth, 24/7 hardware replacement, free SSL, website builder, and many more. More information is available on our website. Please visit our website.