Considering that 80+ Gold PSUs are often deemed "good enough," when does Platinum's higher efficiency justify the increased cost, especially for moderate-consumption systems? Does the long-term cost savings outweigh the price difference? Besides the 80+ rating and potential noise levels (as raised in the Dell community discussion), what factors, such as wattage requirements and brand reliability (like Corsair, Super Flower, and Seasonic), should influence PSU selection?