I'm a homeowner with 6 acres of bermuda/centipede. I'm finally stepping up to a zero turn, and I want to make sure I don't make a bad choice. I really like the Scags...particularly the 61" Turf Tiger and Cheetah (from the reviews I've seen on this site). My dealer has both in stock, but is pushing me towards the Cheetah with the 850FX Kawasaki engine. I'm planning to run the mulch kit most of the time, and I'd like to pull an aerator around once a year (and maybe a very small trailer). I have a few small hills, but overall pretty smooth/flat. I have about 40 trees and a few flowerbeds. Do you think the 850FX will be enough power, or should I step up to the 921? The Cheetah and Turf Tiger are roughly the same price, so would the Turf Tiger be a better choice. This is my first post as I'm pretty new to the site, but it definitely won't be my last. Thanks.