I like hydros alot more. With my Bunton belt drive I have a property with a large hill and plenty of room at the bottom so I just let her fly. Don't even touch the brakes on that one. I just use my weight along with pushing and pulling on the grips to keep her straight. It takes a heck of a lot of practice to keep the lines straight, and it wears you out....QUICK!
Another thing you want to stay away from is the Buntons. Their quality has taken a serious nose dive ever since Textron bought it. I'm constantly eating up the belts on that machine, and had a horrible time attempting to get customer support from Textron. For example: The new drive belts I bought at the end of last season only lasted 2 weeks before they started slipping so much I couldn't even load the machine on my trailer without me getting behind it and pushing, and that's after making all the adjustments to the tensioners.
As far as sulkys, stay away from the "Mowersulky" made by Havener Enterprises. I experienced problems with their cheap construction, and tried to get it taken care of through my the Bunton dealer who sold it to me. Even though it was still under warranty they turned me to the manufacturer. I then contacted Havener Enterprises and they told me to take it to the dealer. The easiest way to avoid this problem is not to buy anything else from either of them.
My suggestions are to go with a hustler hydro and a bullrider.