Actually, PC Power & Cooling's PSU's are REALLY efficient. They run at about 75% efficiency compared to most 50%-60%. The 850w PSU will use about the same amount as a normal 500w PSU from another brand. PC Power & Cooling is the best PSU company in the market, hands down. Pure reliability, power, and stability.
no, the new ones are not, the old ones, yes, the new ones, that plugs break off insanely easy. If you are getting a modular psu, get the OCZ Modstream 520.