I'm looking for a 21 inch self propelled mower to replace a troybilt 33 inch as my gate mower. I would buy another troybilt, but paying $1500 for a new mower that will only be used for 5 lawns doesn't make sense. I'm hearing good things about the Toro Super Recylcler. I know it isn't "commercial" but neither is the Troybilt which has been running over 10 years. Will the straight axel of the toro slow me down, or should I be looking at caster wheels like the Ariens, CubCadet, etc.?