should I trade out these sleepers?

I drafted a few sleepers this year, that will end up being my starters, but I'm a bit concerned as I dont see them ranked here.

Kelvin Sheppard (Buf) LB
TJ Ward (CLE) S
Jordan Babineaux (TEN) S
DJ Smith (GB) LB

These guys have great potential, but did I make a big mistake drafting so late and picking these sleepers (as opposed to drafting my IDP players earlier with more higher ranked players)?

I can still pick up a few other players like:
Donte Whitner (SF) S
Reed Doughty (WSH) S
Sean Jones (DET) S
or
David Hawthorne (NO) L
Kevin Burnett (MIA) L
Jamar Chaney (PHI) L
and Terrell Suggs and Pat Angerer are still on the board as well.  

Should I trade any of these players out?
(I got most of my sleeper info from Monk's IDP site)

Thanks for any help!

id definitely dump ward bc all of his value in 2010 was from the front 7 being so weak and as you saw last year that front 7 is really strong now when healthy.

there should be so better players available then those

I think you should stay put. None of the guys available on the wire are better than who you have currently rostered. I have Sheppard ranked in the 45-50 range for linebackers but that's only because he hasn't established himself as a three-down linebacker. Once/if he does, he has LB1 potential. I have Burnett ranked higher but his upside is near that of Sheppard's.

Thanks Ryan!
I'll be looking forward to your waiver wire pickups thread as the season gets rolling.
Your advice and suggestions were a tremendous asset last year.
Thank you very much for your time and insight!

I tried something similar in my ESPN draft (16 teams) today.

Because the league had 2 QB, 2 TE, 2 K, 2 HC and 2 D/ST I decided to focus on filling all of my OFF starter slots (also 4 RB and 4 WR) and even some OFF backups (remember 16 teams X 2 for some positions).

ESPN had many excellent IDPs, especially rookies, rated way down the list.

I was able to pick up IDPs like Hawthorne, DJ Smith, Fletcher Cox. Geno Atkins, Chandler Jones, Dont'a Hightower, Bobby Wagner, Andre Branch and Quintin Coples very late in the draft.

I think NFL.com is similar, but I don't know about Yahoo.

I didn't get Pierre-Paul, Willis, Berry, etc. but I am set offensively with backups in a deep league and have a lot of good IDPs, many with great upside.