If you think you can work with Joomla, it could turn out great. If you want just want to use an easy to use CMS, I recommend
http://www.cmsmadesimple.org/
But one thing you must keep in mind: No software or CMS can do the
SEO for you!
By the way, before making up your mind what CMS you should choose, read this:
http://www.steptwo.com.au/papers/kmc...kes/index.html