If it's a yahoo league where DL and LB are in the same catagory always pick 2 LB's.
listed in my order of preference:
LB: Lewis, Urlacher, Edwards, Sharper, Fletcher, Morgan, Thomas, Barton, Brooking, Sirmon, Bell
DB: Williams, Archuletta, Reed, Wilson, Dawkins, Sharper, Harrison, Wire, Lewis, Barber
DL: Strahan, Taylor, Peppers, Abraham, Rucker, Freeney, Rice
In any normal scoring system I would rate all of these IDP's as top 100 players(Lewis, Urlacher, Williams, Archuletta, Strahan, and Taylor top 50)and draft them accordingly. Consider the 4th round if you're not that hot for a certain #2 WR. Most definitely the 5th round.