Lawnboy, if you get the 2 cycle one, get it. If not interested in a Lawnboy, look for one with the Honda engine. More horsepower means cut taller grass. Here in Iowa you could cut the grass on Saturday, then it rains for next 2-3 days and by Thursday the grass can be 4-6" tall again.
BTW I bought a 2 cycle lawnboy 2 years ago to mow my old 1/2 acre yard, worked like a champ even on the grass in the leech fields, temporaily moved into town so I don't have too big of a yard to mow, but it will make short work of it.
Charby