i currently am looking to buy another mower and have my dad help me out next year. if it works out i would have him doing only my residential homes. they average in lot size about 1/4 to 1/3 acre. some have some desent size banks on them. what do you think would be a good **size** walk behind mower. i would like to stay with either toro or exmark. i should mention that i do quite a few "new sod lawns" and they also get quite spongy at times because they hire cheap lanscapers.