I am starting to see end of summer sales on various riding mowers and with a .5 acre mowing task, I am growing tired of pushing around a small rotary mower since we moved to this new house. Based on the experience of all you BITOGers out there, what brand of riding mower and engine would you recommend? Are there any particular models in a given brand that you feel strongly about (+ or -). Any features that you feel strongly about (pressurized oiling system, for example)? I'd be pleased to hear all of your thoughts in this area. I take very good care of my power equipment and have a 23 year old snow blower and a 27 year old Lawn Boy rotary mower.