Which CMS would be best? I have a site that has multiple categories for input as well as reviews that can be added to by the users.
Assuming you meant Dreamhost instead of Dreamweaver, I would probably suggest Drupal
You can try demos of alot of different CMS packages on http://www.opensourcecms.com.
A good site to check is http://www.cmsmatrix.org/matrix because it let's you do side-by-side comparisons of various CMSs; or you can input the features and criteria you require and it will tell you which ones fit the bill.