The topriders rides Dauphine and Suisse to prepare for the TDF, Pais Vasco to prepare for the Ardennes and Paris-Nice and Tirreno-Adriatico primaraly for a result (as its the classics riders that rides those to prepare for Classics). For me therefore Paris-Nice and Tirreno-Adriatico are the most prestigous, but ofcourse all of these races are still fairly equal. Catalunya I just feel is a bit less important, maybe because its a bit forgotten in a hectic face of the season with many other races going on and as its never a topgoal for anyone, Romandie is also either for Giropreparation or for tired riders riding a final race in that part of the season and again only a topgoal for very few riders, and finally Binck Bank is a interesting race but its not really a race suiting the Grand Tour-riders and therefore I think its less prestigious to win, as stageracing is generally about Grand Tour-qualities. And Greg Van Avermaet and Tim Wellens and those kind of riders are not great stageracers.