I wouldn't do it.
Marshall will have a nice bounce-back season after a mediocre 2010 season..... but I also expect Britt to have just as good of a season. He is clearly the #1 in Tennessee. He won't have numbers like he did in week 1 every week, but it also was no fluke. He's had great games last season with Kerry Collins at QB or even previous to that with Vince Young. Hasselbeck will probably target him like 10 times a game.
QB - Drew Brees, Tony Romo
RB - Adrian Peterson, Trent Richardson, Alfred Morris, Jacquizz Rodgers
WR - Brandon Marshall, Julio Jones, Vincent Jackson, Anquan Boldin, Golden Tate
TE - Heath Miller
DEF - Rotating
K - Justin Tucker