Id say you are good sticking with the top three. Meachem is basically their #1B slightly behind colston. He is getting lots of looks and they cant afford to double team him since the saints have so many options. Good luck.
10 team yahoo standard 2 qb keeper league
QBS- Rivers, Ryan, Grossman
WRS- Roddy, VJax, Santana Moss, Lance Moore
RBS- D Will, Knowshon, Fred Jackson, Mcgahee, Sproles, PT