Willie parker has been getting solid yardage but only 1 TD this season. Marvin Harrison has 17 receptions this season, though his bye is over and he should be getting over his injury fairly soon.
Your RB's look good, but what do you do if one of your RB's go down? Lamont Jordan just returned from his back injury. What if McGahee is next? I like those RB's, although of them all Jordan would be the one to get rid of in a trade. If it was Jordan being asked for then Yes, but its Willie Parker, so I'm going to go with no.
I'm sure you could pick up a nice solid WR from the waiver over those two.