Chris,
We are a full service AE where I work for(http://www.lrkimball.com) including LA services within the Architecture Division I am a part of. We have migrated Architectural and Structural disciplines to Revit, and are slowly trying to drag the MEP disciplines. We have looked at the limited Site / LA tools within Revit (and the new Eagle Point add-on) but have decided to wait until more appropriate tools and conten are available. We currently use Civil 3D for our LA people in-division, as well as for the Civil / Survey / Highway folks in the other divisions. There realy isn't any comparison between the 2 for LA function right now, even with the enhanced topo features reportedly part of the 2011 release - which is due any day now. I will have to look for the link when I am back in the office, but I did see a reference to Autodesk now starting to seriously consider a Site version of Revit that would include LA / Civil tools. It will be great for the entire project teams to be working in BIM, but I wouldn't anticipate it all that soon considering the monumental task it will be to create the corresponding tools and content required.
As a lomg range strategy - it probably wouldn't hurt to get some eposure to BIM in general and Revit more specifically now. It IS a whole different approach and mindset though - which some people admittedly have a very difficult time transitioning to.
Hope this helps!
Dean