Because each and every one of the providers have paid special attention, it depends on what you are looking for.
Bluehost is one of the most competitive bidding providers and is a very good option.
We will provide root access to your essential server in digital origin and can install any software that includes a railroad. We also have images that have been installed with a click on a RileyScore. This means that you do not have to take the time to install rales and install all your dependencies, and it seems that it is in full order, unlike PaaS as Hero. We have a large community that can help you start with many common tasks.
If you are looking for a totally manageable solution, Raxpes is the best provider. You will be provided with system administrators who can log on to your server for the most common system administrator functions, however, there is a large price increase.
They are similar to EngineYard Rackspace, but only focus on the rubber for the rails, so they are excellent if you are looking for a managed hosting experience specific to the rails. But again, with a significant price.
So you really decide to decide for yourself what is the best for this.