Just completed big deal-looking to tweak my squad

[Dubjay]

Yahoo 5X5 non-keeper roto league
Just completed big deal
My ROLEN, BURNITZ, D.ROBERTS
for
His DELGADO, PIERRE, SOSA
He proposed it to me believe it or not.
Here is my squad
C-Posada
1B-Delgado
2B-Kent
3B-Hinske/Teixeira(not sure who to start here)
SS-Arod
OF-Sosa
OF-Pierre
OF-Green
Util-Edmonds
Bench-Patterson, Klesko, Cameron
SP-Mulder, Millwood, Santana, Buehrle, Pineiro, Harden
RP-Isringhausen, Nathan, Marte

I am pretty happy but always looking to upgrade
Available FAs:
H.Matsui
D.Young
L.Walker
Koskie
Encarnacion
Gibbons
Guillen

Ponson
Washburn
Lieber
J.Williams
J.Thomson

Any help would be greatly appreciated. I am tempted to pick up Ponson or Lieber but am unsure who to drop.
Any help greatly appreciated.

[bestinwest]

I'd trade some of that extra power for some SP, i think u can afford to drop some power u have strong line up offensively but the SP is looking weak to me, go after some SP you'll be good