Overall, you had good picks and I agree with them, but with a few differences in selection and/or order. Here's..

Mad Vikes Picks
QB:
1. Carson Palmer (if he can stay healthy)
2. Peyton Manning (#1 if Palmer isn't healthy/injury-free)
3. Donovan McNabb
4. Marc Bulger
5. Tom Brady (would have been my #1 pick 2-3 years ago, but no longer. May not even be in the top 5 next season if the Pats dynasty continues to crumble. Matt Hasselback or Eli Manning could take his spot.)
RB:
1. LaDainian Tomlinson (he's my #1 pick and served me well as my RB in 05)
2. Shaun Alexander (as far as I'm concerned, Alexander and Johnson are interchangable. Johnson could easily be #2 as well.)
3. Larry Johnson
4. Tiki Barber
5. Clinton Portis
WR:
1. Steve Smith (the monster from Carolina and even more potent with better support via the draft)
2. Chad Johnson (my very, very,
very close #2)
3. Torry Holt
4. Marvin Harrison
5. Randy Moss
Note: I would have put Owens in the top 5 if he was still with the Eagles.
TE:
1. Antonio Gates
2. Tony Gonzalez
3. Todd Heap
4. Chris Cooley
5. Alge Crumpler (a longshot, but I think he has the ability to get the job done)
DEFENSE:
1. Chicago (agreed, the #1 defense in the NFL, bar none)
2. Carolina (also a very strong defense and a serious SB contender)
3. Pittsburgh (the results speak for themselves)
4. Indianapolis
5. Cincinnati