haven't known anyone who has owned one of these programs who hasn't invested years into using them, to get good at them.
If you're in design/build, how do you design now?
ProLandscape is the best one out there (in my opinion).
Has an interface ability with iPad for design/sales/presentation on the go.
Has inventory and takes plans and translates them into estimates/proposals, and tracks the project while in process.
I have not found one that does 'easy' topo lines in a removable layer.
A cheap trick with ProLandscape is to get a topo off of a DWG for the plat in question that's already done (can be had if your area has GIS) there is a way to do it with google earth too, but I havent found it yet.