Can people who play nba 2k10 help?

i am trading caron butler, ron artest, and eric dampier for rashard lewis, gortot, and jj re. Do you think this is a good trade why or why not? I am the mavs and the only player i don;t have is shawn marion. The trade in real life would suck, but artest and butler both seem to be terrible shooters which takes away alot of value in 2k