I don’t like menus – they’re always a bit of a pain to implement!
If you can get away with out the drop downs I would, purely as it will cut down on all the code going into your web pages.
Have a look for some Free CSS menus in Google. The quality’s generally a lot better than I though it would be and it offers a good starting point for you to play and around and tweak the code as you see fit.
Here’s a site I found the other day with some nice designs on:
http://www.13styles.com/category/css-menus/