What brand in general has the least amount of maintenance for its riders? I am specifically looking at the Exmark Navigator and the Walker T. I know there is an entire thread about the two but overall maintenance (not just the frame cracking) is what I want to know about. I currently use Snapper and have had good results but I want a front mounted deck with the ability to get into tight places. A lot of the yards around here are small or odd-shaped. Any input is appreciated. Thanks.