They need help at DE, LB,FS, R-OT and WR. If they don't make a trade for DE Darrin Howard, they will probably like to pick DE Shawne Merriman. I think they would like to improve the right offensive tackle position. Alex Barron and Jamal Brown are two of the names mentioned in several mock drafts. LB may not be a glaring need, assuming they stay in a 4-3 defense. The free safety position may be filled by moving Pete Hunter fron the corner position. Dallas needs to add some speed and youth to the receiver position. The loss of Terry Glenn really hurt the Cowboy's passing game last season. Troy Williamson and Mark Clayton are speed guys that could give Dallas a deep threat.
With the 11th & 20th pick, I would like two players that could step in and help Dallas right away. DE Merriman and one of the OT's could be those guys. Remember that Parcells wants to be great on defense and grind the ball on offense. Merriman would supply a much needed pass rush and those tackles would team up with Rivera, to make Dallas very strong running to the right side.