I have a landpride 6'. Just one pass is all you will need. I don't like to drive on the dirt any more than needed. Depending on the weather and soil, the tractor tracks are more noticeable and the less driving, the better. When the seed first comes up, you will be able to see "rows" but after 6-12 months you won't notice it. Don't leave a skip between passes, that will be noticable. If you have a skip, just reseed over it by hand or make another short pass with the seeder. I tend to plant a little heavier than recommended on the seeder.
Brillion was the standard in its day. Still probably a very great machine. In my area I see mostly landpride. I have no issues with my landpride and I have rented them in the past. I bought my landpride used on an auction 1 year ago and it appeared to have been used very little. Looked new. Paid $2500 which I thought was about $2000 less than new. I have planted about 15 acres in two planting seasons. Need to plant about 3 more acres soon but too much rain. Will plant 5 acres of warm season grasses in about a month.
My brother got a recent bid for the state to plant 2 acres of grass and till the ground for $3500. $700 for seed the rest labor. I thought that was pricey.