Power Cords/ Conditioner/Surge Protectors

Do I need to add power cords/conditioner/surge protector to my system or is it product dependent.

My current system consists of:

• Moon 390 network player
• Moon 761 amplifier
• Sonus Faber Sonetta V speakers

Should I use the stock power cords on the Moon equipment or look at new power cords? If new cords should be purchased let's hear some recommendations. Will the power cords change anything sonically?

Should I also add power conditioner/surge protector to the equipment? Again, does it change anything sonically? If recommended do you look at Shunyata, Panamax etc.

Thanks for your input/recommendations.