My takes on these three have changed only slightly since draft day.
The consensus appears to be that Aaron Curry has the best long term potential. I'm happy to go against the grain a bit and argue in favor of the most talented players (see Jerod Mayo last season), but only if the situation isn't as bad as might be feared. In this case, with Leroy Hill back in the fold, Curry is likely to be slotted at SLB, will have plenty of competition for tackles at the point of attack and in pursuit and may have to fight for snaps in subpackages. There doesn't appear to be much likelihood of a positional shuffle given the current contract situations. It happens, but it's extremely uncommon for an every-down SLB to top 90 solos. When it happens, it's generally not repeated the following year. There's a small chance that Curry ends up on the weak side, but he's said he expects to align at SLB. To me, talent aside, that's a recipe for inconsistency rather than a Keith Bulluck like run of multiple seasons in the top ten.
If I'm in a redraft league or have a dynasty team with an immediate need at LB, I'd draft James Laurinaitis. I'm not convinced he's downhill enough, quick enough in pursuit or talented enough in coverage to push himself into clear LB1 territory, but he's very likely going to be the only every-down linebacker in a traditionally productive position this season. Long term, he looks like a very safe high LB3 to mid LB2 option.
I'm clearly in the minority again this season, but since the rookie rankings are meant to have a long-term focus, I've got Rey Maualuga first overall. He's the most downhill of the bunch and *should* slot into an every-down MLB spot at some point in the future. The early decision to start him at SLB could seriously hurt his 2009 value, though. Odds remain the same that he'll have a highlighted role in 2010, but his development (especially in coverage) could be stunted if he's not getting practice and game snaps in the middle. Still, I think he's the best bet of the bunch to have an extended run in the top 15.
I thought last year's class was a step back from the Ryans-Sims and Willis upper tiers of previous seasons, only to now feel that Jerod Mayo and Curtis Lofton belong in the top 12-15. The same could easily be said for any one of these three. There's a player for everybody in this class. If you're the type that wants all-around talent and can tolerate questionable opportunity, Curry is an easy call. If you want an aggressive potential playmaker that could explode at any point, you take Maualuga and hope for the best. If you want a safe option with some upside and the likelihood of immediate production, you're drafting Laurinaitis.