Tight end and wide receiver in that order. I actually like the UDFA corners we signed last year (Wallace, Woods, Lampkin), Durant could be solid, they probably want to see what they have in Forbes, and if they're still unconvinced, they'll either re-sign Witherspoon or draft a mid-round corner; this class is filled with solid corners who could fall under the radar (Jacob Parrish, Nohl Williams, etc.)
Inside linebacker is a need, but the Rams never seemed to value the position. Speights was great in his rookie year, and they could probably use a late round pick or spend money for a solid UDFA. I think Hummel will take over the other starting role, and he may end up doing a better job than Rozeboom (and certainly better than Reeder).
Running back is a position where I'd like to see more explosion and better ball protection, but I doubt the Rams are going to spend a pick after they put so much into the position already (drafting Corum, plucking Schrader off the 69ers roster).
Quarterback stopped being a need once we re-signed Stafford. Backup? Possibly, but this isn't the class for it.
Nose tackle is something I don't think we need. We could sign someone like Leki Fotu if we really wanted, but Davis, Johnson (whom, despite his size, is an outstanding run defender), and Olajiga (physical freak of nature) look like a solid group. I'm much more worried about interior pressure from the backups.
It has to be tight end, first and foremost: without Higbee, we had no threat from any tight end, and Higbee is already injury prone and old. Fortunately, this is an excellent class for tight ends.
Then there's wide receiver. We could sign someone in free agency, but this is a good class for wide receiver. Really would love to have Luther Burden III; I think he brings the explosive deep threat we lack, and I truly believe his attitude issues are overblown. Getting him in the second round would be a dream come true to me.
But what we really need is a more dynamic offense.