Especially how many players you can start at each position and how many teams are in your league. If there are a lot of teams, then you definitely want to lock in a QB early. If you only have like 8 or 10 teams though, you can probably afford to wait on a QB.
1. Adrian Peterson is a lock. You have to keep him
2. D. McFadden should be kept too.
3..... Several close choices
If you really want a QB, go with Ryan here, but I think you have better choices. Gates, V. Jackson, Mike Wallace, and Desean Jackson are all good, and pretty close in ranking to me. If I had to choose, I would go with Vincent Jackson, although I think Gates is slightly more valuable.
Side note, Eli Manning, Josh Freeman, Felix Jones, and Jets should be dropped from your choices.