Test Environment/Platform Suggestion

[phoenixcreation]

Greetings!  I'm new here, though I've been using Joomla for various clients for about the past year.  My new job is tasking me with implementing a new CMS from the ground up for them, and based on their project goals, I am in the process of recommending Joomla. 

I do have a question though (will end up with lots over the coming months I'm sure, but this is one I haven't been able to find what I'm looking for to date):

I'd like to setup a test and live environments, so that the editors, myself included, can post content and modules and more to the test site for review, and then move it over to the live site without having to setup 2 entirely separate Joomla installations.  That way there will be "no" chance that the editors can crash the live site with changes and the like.

Any recommendations that can accomplish this?  I've looked at the Multi-Site extensions, but am not sure if they are in the realm of the concept above.  Thanks for any help possible.