If you go with Antec and it's not a "True Power", it's a False Power, that is their cheaper supplies are just as bad as many other cheap supplies.
If you really think you need a new power supply I'd go with an FSP350 from Fortron Source, Sparkle Power, or Aopen. These power supplies produce nearly as much power as Antec's True Power 430, and would be far more than you need for that system. They cost around $40.
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