Add/Drop Help!

[rcarson]

10 team standard league, no ppr

QB Tony Romo
RB Chris Johnson
RB Darren McFadden
WR Calvin Johnson
WR Anquan Boldin
FLEX Fred Jackson
TE Antonio Gates
D/ST Patriots
K Sebastian Janikowski

BENCH Santana Moss
BENCH Nate Burleson
BENCH A.J Green
BENCH Greg Olsen
BENCH Marshawn Lynch
BENCH Joseph Addai

I'm pretty happy with my team for now, but there are some free agents I'm considering picking up. Here are the top names available:
QB Ryan Fitzpatrick
QB Cam Newton
RB Ben Tate
WR Deion Branch
WR Devery Henderson
TE Anthony Hernandez
TE Ed Dickson

Right now I'd like to pick up Fitz, Tate, and Hernandez, but I don't know who to drop. I'm thinking AJ Green, I'm not sold and he's probably my 5th WR anyway. Also I don't have any particular attachment to Lynch or Addai. I really want to hang on to Olsen though, I took him right before my friend who waited on TE and loves him, so I will probably be able to trade him soon. However, I do have some reservations about cutting ties with Green, Lynch, and Addai this early. I'm thinking picking up a backup QB and another TE before I trade Olsen is probably a wise thing to do with Romo/Gates. I'm 6th in waiver order right now, so I'm considering not putting in any claims and doing some add/drops afterwards, giving me a better position for next week.

Who should I keep, who should I drop, and who should I pick up?