1st - welcome to DobberHockey. Great job on your first post! Very well detailed league information, great work.
Keepers:
C(2): E.Staal, Duchene [Tough to let Backes go... but...]
LW(3): Ovechkin, Moulson, Eriksson
RW(3): Voracek [I am not sold on Wheeler or Purcell]
D(2): Shattenkirk, Enstrom
G(2): Bryzgalov, M.Smith
I think you may want to move Enstrom.
I love Enstrom and think of him as a top 20 defenseman in straight-points leagues... but you can't have him taking up space and not producing if you have a shot. Try offering him to the Byfuglien owner, simply because there is appeal in owning a "tandem".
You can also try to move Brayden Schenn. PHI has played a lot of games. I like Schenn but he's not a keeper for you and he got some extra time/opportunities earlier in the season with Hartnell out. He's a good SELL.
I know your defense looks bad, but I'd simply try to patch it.
Overpaying for defense is often a mistake. I'll send you a PM and list of some emerging D-men, I've got claims in for some of them in my DobberEntry league and find they get snatched up from me if I start discussing them too soon.