Hi, I'm glad my bike is generating so much interest. I am fairly certain that the Sierra comes with 50/50 knobbies but Scooterescapes puts on the road tires because the bikes sell better here with them.
Keep in mind prices on these things are totally negotiable. Depending on how many the dealer ordered will depend on the discount he got. You can go here to find out if there is a dealer near you.
http://www.zongshenamerica.com/locate_dealer.html
Try not to pay more than $1600-1800 any more than that and you could get a very low mileage Jap bike in like new condition used. If I didn’t have a dealer near me I would have ordered from XXX-Motorsports. I know either bike will be fun. Good luck!