[zaga_fan]

I would take Welker and Gronkowski over Jennings.

Mainly because Jennings doesn't really bring anything special to the table.
Welker and Gronk give you something that other Receivers can't give you.
Welker is small and quick enough to make him a hard tackle in the dink/dunk or screen game. While Gronk is simply going to jump up to get balls and then truck people afterward.
With Jennings you get a sure-handed WR that runs good routes.
Which is GREAT to have on your team...
but he isn't going to outrun everyone, he isn't going to outjump everyone, he isn't going to outmuscle anyone....he's just going to catch it if he's open.
The Packers have a really good WR core, but they don't have anyone that is a real matchup problem for anyone. Just well-disciplined WRs with an all-star QB.