Rate my team

[Komodo]

20 team league, H2H, categories are FG%, FT%, 3PM, PTS, REB, AST, ST, BLK, TO.

My team:

PG: Harris (PG)
SG: Vujacic (PG,SG)
G: J.R. Smith (SG)
SF: Wallace (SF,PF)
PF: Nowitzki (PF)
F: M. Williams (SF,PF)
C: S. O'Neal (C)
C: Millsap (PF,C)
Util: Korver (SF)
Util: Stackhouse (SG,SF)
BN: Przybilla (C)
BN: Walton (SF)
BN: Ginobili (SG)* (out 'til mid December-first of January)

Should I keep Walton as my last roster spot, or go for someone like Aaron Brooks (PG,SG), Theo Ratliff (PF,C), or Kareem Rush (SG)? Lesser options include Joe Smith (PF), Darius Songaila (PF), Jarvis Hayes (SF), Sasha Pavlovic (SG,SF), and Jason Thompson (PF,C).

Thoughts?