I have an old Ultegra 9spd system (with brand new 10 spd DA rear derailleur). My shifters rattle. Time to upgrade. If I go on Ebay, etc., what DA shifters am I looking for? There seems to be several different #'s. I want 10 spd, as I will change the crankset also. I assume you cannot mix Shimano and Sram, so I will go with the DA shifters and a compact crankset. NOT a triple! What do I look for? THX