All eyes, not to mention ears, will be on Orchestra Hall this week as Daniel Barenboim conducts his first concert there since being named the CSO's music director designate last month. Barenboim, who is also music director of the Orchestre de Paris (not to be confused with the newly formed French Bastille Opera, which recently fired Barenboim amid a storm of controversy), will demonstrate his ability not only as a conductor, but as an orchestra builder as well, having reportedly constructed a first-class orchestra since arriving in Paris 14 seasons ago. Prior to his taking over, no less a conductor than Sir Georg Solti himself was music director, but Solti ran out of patience and left the undisciplined orchestra to his younger colleague. Obviously, this concert will answer many questions about what kind of future we can expect from the Barenboim/CSO collaboration. The program is all-Debussy, including his haunting Images and his two most popular symphonic pieces, Prelude to the Afternoon of a Faun and La mer, both of which have come to epitomize the French Impressionist movement in music. Monday, 8 PM, Orchestra Hall, 220 S. Michigan; 435-6666.