I have Celek and Daniels, and Hernandez is a FA in my league, so I know how you're feeling.
Brady really never depends on his TEs much for receiving. Even during the record breaking 2007 season, TE Ben Watson had less than 400 yards. Watson had a small handful of good games, but that was it.
On the other hand, I don't trust Vick passing the ball either, but do remember that he loved throwing to Crumpler back in Atlanta.
Long term, I think Celek will have better numbers. This weekend though, the Pats are facing the Bills in what will probably be a blowout. Since Celek isn't getting many targets from Vick yet, I might just gamble and start Hernandez this weekend, and see how it goes.
QB - Tebow, Flacco
RB - Peterson, Blount, Lynch, Helu, K. Hunter
WR - Nicks, Maclin, V. Cruz, James Jones
TE - Gates
K - Kasay
DST - Giants