CCL: Best DFT for transition elements



Can anybody suggest me for following
1. Best DFT for optimization of transition (1st and 2nd) row elements organometallic compounds.
2. property evaluation such as dipole moment, magnetic moment, excited state character, thermochemistry etc.
3. Whether we need all electron basis or ECP for property evaluation
4. Whether we need relativistic correction or not

Any help would be appreciated. Thanks in advance.

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