I can't say anything about rockhoster.com and libertyvps.net because I haven't cooperated with them.
I can recommend you my hosting provider
hostpro.comIn addition to good services, I appreciate their technical support, which is very customer-oriented and always happy to help, even at 3 am.
Also, their backups are a great help when the site is affected by virus software or simply crashes (but after recovery, you need to make sure to secure the site so that it doesn't happen again!)
Their prices are also good
If you have a free minute, you can go to their website and see for yourself