We have sold lots. Not sure on top speed but our customers who have used them in the mountains were very impressed and said it climbed like crazy despite the 141 track. I know the 800 high country's are very fast and are doing very well. I don't think you'll be dissapointed with speed on the XF high country. I have a couple left and a sno-pro 50th and LTD. Give me a shout if you've got any questions. Cody 306-773-4948