I'd go with McNabb, because he is more experienced, and Vick is the Madden cover athlete. And ya know what that means.
16-team PPR Keeper League
QB: T. Romo, V. Young
RB: M. Turner, B. Wells, T. Hightower
WR: A. Johnson, J. Ford, N. Burleson, A. Roberts, J. Simpson
TE: D. Clark, J. Cook
K: R. Gould