streamlining options across multisite

I am trying to decide if multisite is the right option for me – I am looking to create a website where a select amount of people will each have their own blogs that feed into a main page that is organized by categories – ex are news, events, advice – and so on. Almost like a magazine layout on the homepage. Each individual blog should be able to have an ‘about’ or profile page. So I would like for the look of all of the blogs to be consistent, with options to upload logos or images on each blog. How easy it is to ‘lock down’ the ability to edit the templates, etc – I essentially want each blog to have limited permissions – is that a simple thing to do?