How is this team in a NL-only league??

[Seinfeld]

I'm in a Yahoo 12-team roto 5x5 NL-only league.
This is my team:

C Y. Molina (StL - C)
1B A. Dunn (Cin - 1B,OF)
2B R. Durham (SF - 2B)
3B S. Burroughs (SD - 3B)
SS J. Wilson (Pit - SS)
OF C. Beltrán (NYM - OF)
OF B. Giles (SD - OF)
OF B. Wilkerson (Was - 1B,OF)
Util L. Overbay (Mil - 1B)
BN D. Mohr (Col - OF)
BN T. Wigginton (Pit - 1B,2B,3B)
BN A. Everett (Hou - SS)

SP J. Peavy (SD - SP) SPPBench
SP L. Hernández (Was - SP)
RP D. Kolb (Atl - RP)
RP Y. Brazoban (LAD - RP)
P J. Williams (SF - SP)
P V. Padilla (Phi - SP)
P T. Glavine (NYM - SP)
BN T. Jones (Fla - RP)
BN E. Jackson (LAD - SP)

There are several players maybe worth to pick up in the FA, should I pick up these players??

1. J. Phillips (LAD - C,1B)...is he better than Molina??
2. A. Harang (Cin - SP)
3. T. Ohka (Was - SP)...are these 2 SP better than Jackson??
4. J. Valentine (Cin - RP)

Thanks for help.....