I ride in the northeast where its a lot of tree and technical riding, earlier in the year I was hot and horny over the Kingcat, I was stopped one day riding and heard an XF9000(same motor) go by and was like "WTF is that!!" Further research pointed me to the King Cat sled. Early March we were having lunch and a guy pulled up on one. I started chatting his ear off and he asked if we wanted to go play as he didn't know the area as well as we did, and we ended up switching sleds for a bit. I currently have an 18 Mountain Cat. I immediately missed the instant throttle response of the 800ctec. The power and traction was awesome I will say, just takes a sec to get there. The weight difference is defiantly noticeable, the front end kept wanting to dive into the snow on me and if your line was not set up perfect, it wasn't going to play, the Mountain Cat is much more forgiving.
I'm not trying to discourage you from buying one, but you just need to realize this sled has its place, and its in big chutes and open areas, not the trees.