i absolutely love it, plenty of power there when you need it, but its not to overly aggresive in feeding the power so ive found there to be bags of grip, in dry dusty conditions, yet to ride it in wet so cant say. the front end has a super light feeling making it manouverable. the only thing im not liking on the new shercos is the gearbox, its crap for selecting gears, susposidly theres something on it to stop false shifts, dont know if thats why, but its really notchy and can be a pain to go between gears in middle of section under pressure.
i personally would go for the 290 over the 250 as theres 50quid in it, and if you can handle a 250 you arnt going to find the 290 trying to pull away from you or feel much in weight difference, plus extra power is always handy.