Looking for ztr mower. I have about 3.5-4 acres to mow. Very flat with approx 15 trees. I have looked at several, however have not used one yet. I am looking to spend around $4000-$6000. I am leaning towards Hustler Fastrak, but need more help. How does the hustler stack up against Ferris, Gravely, SCAG and Bobcat.