I have been thinking about purchasing a slit seeder to overseed with and was wondering what brands to consider. I am wanting one of the self propeled type machines but dont know enough about them to make a good decision as to what features to look for. Most lawns between 10,000 to 20,000 sqft. Also wondering how well these machines work on new lawns as a primary tool for seeding. The ground around here packs extremly hard even after tilling and most coustomers wont pay to have topsoil hauled in.