Alright, just search on here for dethatcher or verticutter and you can read all you ever wanted to know. But about mowers and things you need, stay away from lowes. They are a good place to buy handheld gear, but not mowers/trailers things like that. http://stlouis.craigslist.org/grd/3464092302.html
There is a good mower, a bit pricey, but thats what you want.
I am partial to Stihl for trimmers, and blowers, but echo commercial products are great as is husqvarna, and red max