PSU, I would go with a 550W at the very least, I suggest Antec, awesome brand with dual 12v rails.
Memory, I do not overclock so I would just get the basic 1 GB sticks of whatever speed you want) 400,533, ect.
Sound card, eh I always use the one on the Mobo, so I am no help here.
"Truth is violated by falsehood but outraged by silence."
"Mastering others is strength, mastering yourself is true power." ~Sun Tzu
"Ad Astra Per Aspera"
"Our greatest glory is not in never falling, but in rising every time we fall." ~Confucious
"The true measure of a man is how he treats someone who can do him absolutely no good.” ~ Samuel Jackson
“Omnis vir est fortunae faber”