Suggestions;
Didier Bur's truly excellent points cloud plugin (Cloud v8.0bxx) is excellent and well supported - get it from the plug-in store. Fredo's Toposhaper will generate surfaces from that data. If you need to do more work on it, import and preprocess in a GIS like QGIS and then export as a shapefile and import that into SU using the Spirix shapefile importer (https://sites.google.com/site/spirixcode/code/spirix_shapefile_importer.rb?attredirects=0&d=1).Ive been using QGIS to match up LIDAR generated 2m contours with imagery and align to the same CRS. Importing using the shapefile importer has required some simple scaling but gives good results.
