I find any kind of CMS very helpful. Especially if your team is lacking in members that can use HTML, PHP and so on. But I have to agree by using PHP Nuke you run the risk of looking exactly like someone else's site. What my team uses is e107 which is an open-source CMS. There site is
www.e107.org One of its' cooler features is allowing each user to view the site in a different theme. This gives power to the users which is great. Check out our site at
www.aceshigh176.com It is made with e107 and only took about a day to set up.