From when I was looking to buy a ski. I was looking at 650sx and 750's. I was told the 650sx and 750's are very stable and easier to ride, but heavy and many times described as a 'boat'. The Superjet had the advantage of being a good freeride/freestyle ski due to ease of mods and abundence of parts made for the SJ's. Much easier to out fit for your type of riding. Which I believe is true now. Pretty much all I rode before my squarenose was 550's and once a 650sx. I noticed with my SN what almost seemed like a wobble while at higher speeds. I just learned to ride it and it doesnt effect me any more. Also had issues with hopping out of the water, figured out its all how I stood in the tray. I upgraded to a r&d intake grate and it helped alot. I havnt ridden many skis but I love my SN(even tho its a 650, for now) compared to the 550's. Fix that ride plate for sure.