I'll likely be in the market for a new 21 inch mower this spring. I know I won't use one a whole lot, but the old Craftsman in the garage has seen better days. I don't mind spending a reasonable amount on a good mower and have perused some of the existing threads looking for input. I've noted several times the mention of 2 cycle engines on hilly terrain, supposedly because of lubrication problems with 4 cycles. Is this really as much of a problem with non-pressurized systems as these thoughts imply? One of the intended uses of a new 21 would be for some ditch areas too steep or small for my Gravely 250Z, but quicker to mow than string trim. My local dealer handles Gravely, Honda, and Lawnboy. Lawnboy would be the logical choice, in 2 cycle. Which would you buy? And, if your choice is Lawnboy, would you go for their commercial mower or another model? Thanks.