I'm looking to cut down some time on a huge property I mow. No trimming, just mowing, but there are some decent sized hills involved which seem to slow me down a bit. I've been doing it in 3 hours with my Encore Z48 w/ kaw 19hp. However, I also have an Exmark metro (ECS) 48" w/ kaw 15hp with a sulky that really seems to blaze when I'm in 5th gear on other properties not nearly as big as this one. Everytime my butt is on the Encore on this property, I can't help but wonder if I was wide open in 5th gear on the Exmark, would I save a half hour or more?... Anyway, I don't have a manual for either so i'm not sure of the top speed for either machine and was curious if anybody had that kind of info at their disposal. I'd also be curious to hear your thoughts in general on this... which would you use? I'm riding now, mostly for comfort, but I'm pretty busy too and picking up a half hour would be beneficial to me.... thoughts?