I wouldn't make that move yet.
I just read a quote where Gary says that the RB by committee in Denver may work well all year BUT I'm not sold on that.
White got the start last week and had mediocre numbers. Wait to see what happens in Cleveland. If Denver stays the way they are then you should make that move
My League: 2 QB; 4 RB; 4 WR; 2 TE; 2 K; 2 DEF
My Team: Manning/B.Johnson;Holmes/S.Davis/Henry/W. Green;Moulds/Burress/Troy Brown/Schroeder;Gonzales/Crumpler;Janikowski/Kasay;Rams/Bengals