thats not really a wide screen. I think the first one suggested is the best deal with the instant savings...if you really want the height adjustments, then you''l prob have to settle for a 19" instead since all the other 20"+ are out of your budget.
edit: and now that im looking around for a widescreen for ya...there isn't any with hieght adjustments.
edit edit: this as good as your going to get as far as heigt adjustments on a wide screen: samsung 20" WS
since it stands hiegher then the others, but its over your budget.