rms7design,
I have an old technology design for a faithful client with swap images and the likes that I'm really not too proud of anymore:
www.vortexventures.com
However, they continue to do so well in SERP with the site that I have hesitated in upgrading as I have here recently:
www.huntanthunt.com
Managing the javascript and associated swap images has been a nightmare over time.
I could blow through CSS menu's like in the first link for a large site within minutes when adding or removing Nav, without a CMS (content management system) in place.
That's value for everyone involved.
You don't need or want 2 Nav systems to manage!
They are next in line here for a serious face lift!
Ken