Nicks is too much for Leshoure but being a 16 team league, his roster is probably pretty similar, talent-wise, so Leshoure is probably a valuable commodity. I would definitely give up Smith or Bowe for him, not Nicks. I wouldn't part with Nicks unless somebody presented a TRich/Ridley/Morris type talent in return. THEN I might think about it considering how deep you are at WR. Good luck and thanks for answering mine!
QB - Drew Brees
RB - Arian Foster, Ryan Mathews, Trent Richardson, Stevan Ridley, Mikel Leshoure
WR - Julio Jones, A J Green, Dez Bryant, Demaryius Thomas, Kenny Britt
TE - Jimmy Graham
K - Blair Walsh
D/ST - Texans