I concur with Sophia on this.
I've been using DreamWeaver for years (GoLive before that, hand code before that back in the day) and IMO it's a very good program (not inexpensive!), but it's NOT the kind of learning curve I think you should require of a client. It's DESIGN software. And if you HIRE a designer, they should be providing a reasonable way for you to update without requiring you to become a designer!
Last summer I learned Joomla to redesign
our engineering site. Very flexible and powerful, but the learning curve was steep. IMO it's not intuitive at all. Spent many hours working on the site, then set it aside in frustration. About two weeks ago, after spending another week getting back into trying to complete the Joomla site, I decided to scrap the whole thing and put it on WordPress with the Thesis theme.
Within less than two weeks it was done, for all intents and purposes, including setting up catalog with a shopping cart. There is still some tweaking to do, but it was so much easier and met our needs.
Add to that the fact that anyone can easily update the news or other items, add to the catalog, etc. and it really works well as a CMS for this application.