Gotta love eight team league start em' dilemmas... hahaha.
I'd say go with Thomas and Marshall. Marshall seems to have 10+ catches a game no matter what so he is a must start and while White may have huge upside, Matty Ice is just too inconsistent of late to rely on for playoffs. Thomas might not get the same level of respect as a WR but I think he is the right start here.
12 team auction (100$)
Foster $30, Charles $16, Tate 2$, Hillman 2$
Boldin 3$, Britt 5$ (drop), Gronk 9$
Tucker, K 1$,Tynes, K 1$
Jets D, 1$
Dwyer, D. Thomas
J. Nelson, Garcon, G. Tate