Now I know Alex's fanboys will likely come out and claim that Alex is eons better than McNabb, and we're better off giving him a 6 year extension (thus making the 6 year plan into a 12 year one), but the reality is there is no quarterback on our roster that deserves to be a starter next season.
Assuming that Sing is gone and Gruden takes over, it would be great to get McNabb in here. Remember, Gruden revived the careers of Rich Gannon and Brad Johnson in both Oakland and TB, respectively. He knows how to play to quarterbacks strengths. In both Gannon and Johnson, Gruden had to put up with QBs that boasted weak arms and lack of mobility. Yet, both excelled under his offensive tutelage.
A McNabb/Gruden combo would keep us competitive in the NFC West for the next 2 aseasons (at least) until the "one" can be developed.