Fantasy Football Trade?

My current team:

QB- Rodgers

WR- D. Thomas

WR- Cobb

WR- J. Brown

RB- Forte

RB- McFadden

TE- Gates

WRT- Ch. Johnson

BN- Rivers

BN- Carr

BN- Witten

BN- Lafell

K- Hauschka

DEF- Cincinnati

The trade:

I give up Rodgers, Cobb, and Gates

I get Brandon Marshall, Dez Bryant, and Ben Watson

My roster would then look something like:

QB- Rivers

WR- D. Thomas

WR- Bryant

WR- B. Marshall

RB- Forte

RB- McFadden

TE- Witten

WRT- J. Brown

BN- Lafell

BN- B. Watson

BN- Ch. Johnson

BN- Carr

K- Hauschka

DEF- Cincinnati

I would most likely drop Watson and pick up another receiver or running back. But I'm trying to upgrade my receivers getting rid of the inconsistent Cobb and replacing Rodgers with Carr and rivers. The Gates was an extra incentive for him since I have Witten. What do you think?