hi ive just orderd a new 2011 yeti 575, has any one heard any reviews? also what bars and size stem would be best on it
cheers.

There is a review of the 2011 model on Bikeradar. Not sure how to do the clicky but a quick search should soon turn it up.

Bars and stem are very much a preference thing but I would have thought the itended use would point towards a shortish stem 65mm ish and wide 700mm plus bars. The Easton Haven stuff is probably worth a look.