As an owner of all three, I value them as....

Edler
Shattenkirk
Carlson

Edler is consistent, he puts up regular points on a powerhouse.
Shattenkirk is close behind, but still needs to prove he can break the fifty mark. I would bet on him though.
Carlson has tons of potential and ability, but has proven the least.

None of these guys are throw aways, but lots of great/bad trades are pulled based on potential and that is the diff. with Edler. He has proven himself.

If you put a gun to my head and said pick one. I take Edler.

__________________
F-Datsyuk,C.Giroux,Kopitar,Read,Duchene,Z. Kassian,Stamkos,Voracek,Hall,Seguin,Eberle,Couture ,Turris,Ladd,vanReimsdyk,Greening,Vrbata,Burrows,K unitz,Hagelin,Doan

D-Carlson,Edler,Hedman,Karlsson,
Pietrangelo,Shattenkirk,A.Larsson,J.Schultz,Faulk, Souray

G-Bernier,Quick,Markstrom,
Neuvirth,Rask,Bachman,Lindback

F-G,A=1pt (14 count)
D-G,A=1pt,+- (8 count)
G-Win=3pts,T=1,SO=2,G,A=1 (3 count)

12 Team Dynasty