This is all great information! The main reason that we decided to add Archicad to our consideration list is that one of our frequent architect partners uses Archicad. However, the local rep here has yet to make a compelling case for it’s ability to easily model terrain, plants etc and I’m having a really hard time finding online resources for it (much like Kimberly stated).
I’m running a trial version of Land FX right now and have ran into the occasional bug but otherwise I really like the way it has been streamlining data. I briefly explored Vectorworks Landmark, but we’ve more or less ruled it out due to the fact that everyone in our office is familiar with Autocad, and we are concerned about having to deliver files that meet the NPS standards (dwgs w/ certain requirements for workflow).