We have determined to use Civil 3D for what it does well and pick up the slack with other programs. Point and surfaces work with no problems and the profiling is just excellent. Corridors are a bit rough still but usable and we are leaving grading ans parcels completely alone. We are doing sewers and hydrology with a good 3rd party app and for now I am exporting the layout into EaglePoint for plat annotation. LDDT is now just taking up space on the hard drive waiting for the last projects to go away. We have no plans to deploy 2006 versions of any Autodesk product and possibly beyond if certain issues are not corrected, especially the INSUNITS fiasco that is doing very vile things to xrefs which we use heavily and most of the blocks and symbols we need.