I don't mind the sub-stage nav, providing its done at industry standards, ie. RocketTheme have a great sub-nav built-in with Gantry. Speaking of, I would actually say their multi-nav method selection is one of the best I have seen in the design industry for some time, being you can change it from dropdown to sub-nav to block with a simple selection.
IMHO, the important thing is that the nav is extremely easily customisable. I ripped out the vb nav and replaced it with my own, and what a speed improvement it made just removing that thing and relying on pure CSS, hand coded navigation.