It's just my simple prediction and everybody can argue the pros and cons and I'm not saying these are the two guys that I would pick but:
I think Bulaga is a RT only in the NFL and OTs that can only play the right side don't go in the top 10. Now it only takes one team to think he can play the left side to prevent him from falling to 13 but at the end of the day I think Davis goes before Bulaga and he's still there at 13.
I also think that Kyle Wilson offers the 9ers everything they want in a CB - height, size, speed, and an excellent cover corner. He is also an excellent return man. Once he starts, likely in 2011, they will have to find someone else to return kicks (that could be Shipley if they draft him this year). Wilson will be the surprise pick going at 17 to the 9ers.
If you add Rashad Jones in the second and Shipley later, that's a pretty good draft.
Again, just my prediction.