i agree with fallen. extra armor is a waste of time.
i like to take standard rhinos to keep points down and use them just to get the troops down the board and then for cover later.
i would consider replacing one chosen squad with a termi squad, no champion with one power fist and heavy flamer and maybe mark of khorne. these can be used to deep strike where problem units are.
plague marines are great for sitting on objectives, they are worth considering.
i like to take standard rhinos to keep points down and use them just to get the troops down the board and then for cover later.
i would consider replacing one chosen squad with a termi squad, no champion with one power fist and heavy flamer and maybe mark of khorne. these can be used to deep strike where problem units are.
plague marines are great for sitting on objectives, they are worth considering.