I went with the lt, and I'm glad I did. The last two days, my friend and I have been riding, and we're the most even on the hill that we've ever been. I'm on an 09 yz450f with a slip on exhaust, a little jetting, and the lt mountain horse. He is on a 2013 kx450f with the st mountain horse. Riding sleds, I've always had a rough time because I'm a big guy. I weigh just over 300 pounds, and he's like 180. We haven't been hill climbing side by side till we're stuck to see who goes farther, but before he would always get places I couldn't. Its not like that now, so I think the long track was a good decision on my part.