Our church is currently using Mambo 4.5.5 as our website content management system. We have had a lot of difficulty using for Mambo as a page editor for fairly basic tasks (creating forms, formatting text, .hyperlinks) etc. We are thinking of either switching to Joomla 1.0 or 1.5, or going with a professional page editor such as Dreamweaver or Frontpage.

Does anyone have any advice regarding either other open source content management systems with better page editors than Mambo, and/or whether any commercial page editors offer rates that are affordable for nonprofits with multiple users?