I think you go Colston, MSW, and Marshall.
I have Colston, Ward, MSW, and TO, and am going with Colston and MSW.
Colston is up and down, yes, but the potential on such a potent offense is just too good to sit, imo. Although the deep guys seem to get involved every week, Colston is the best receiver on arguably the best offense in the league. MSW, as everyone has reiterated a thousand times, plays very well at home. And he's a big, dependable target for Garrard vs. a mediocre secondary. Marshall's upside is too good to sit as well. He's a monster.
I like VJax (I have Rivers), but he's been quiet as of late. And Chambers burned me 10-too-many-times for me to ever start him. He might have 3 TDs and 150yds this week, but I'll NEVER start that bum again. Good luck.