Carolina's other WRs

At some point, the Carolina Panthers are going to have to find themselves an heir to Steve Smith's throne as their No. 1 WR. That may or may not be Brandon LaFell, who has had his moments thus far in his young NFL career, but lacks the consistency required of such a position. It's a moot point for 2013, of course, as Smith will be on the field doing his thing, and LaFell will occupy the No. 2 slot. But what's the situation beyond that starting pair?