Ran a 6 row this year.  Really liked it.  Did have to replace a couple gearboxes when I ran over this stump though:  http://sphotos-a.xx.fbcdn.net/hphotos-ash4/389541_10100372955770714... Trust me though -- parts on the rare occasion you need them are spendy.  I'm very happy our farm has an incedental policy that covered this accident.