One more thought on this: don't bet the house on Houston staying put and taking Reggie Bush. They may or may not think DaBrick is worthy of the #1 pick, but they could pull the same kind of deal San Diego did a few years ago -- let someone else in the top 5 trade up in to take the "must-have" guy (Atlanta/Michael Vick), still end up with a pretty good player (Tomlinson), and add a couple of extra picks/players in the process.
(And yeah, calling LT 'pretty good' was sarcasm. Sorry, Willis, but I'd take Tomlinson as my #1 RB any day.)
Gary Kubiak was on NFLnet Total Access last night. Rich Eisen asked him about RBush; Kuby talked about him a little, then mentioned two other players: Vince Young (the hometown favorite) and "the tackle". Consider, also, that Kubiak spent most of the last 20 years with the Broncos -- who haven't used a #1 pick on a RB since Steve Sewell.