For good info on quiet computing go to www.silentpcreview.com. They have tested many of the components you are asking about, and I think you can do better.
Off the top of my head:
Corsair650 is one of the best.
Asus engtx260 is quiet. I think the nvidia stock coolers on the GTX275 are similar.
Some oem coolers are also very effective and quiet.
Noctua probably makes the quietest fans, and their cooler is very good.
I think the WD green drives are quieter, but they are not as fast as some others.
Antec P182 is probably one of the quietest cases you can get.
It has acoustic panels and sound baffled intakes.
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