All the power supplies you listed are complete garbage. None of them even have a basic 80+ rating for efficiency and probably have no power protections either. They also probably only have a 1yr warranty. A good 80+ psu will have at least a 3yr warranty.
Yes a good 350 like antec is better than a cheap 500.
I recommend a Antec 350/380 or Corsair 430, or something at least 80+ rated.http://www.amazon.co.uk/Antec-EA-380GREEN-380W-EarthWatts-Green/dp/B002UOR17Y/ref=sr_1_1?s=computers&ie=UTF8&qid=1348161573&sr=1-1http://www.amazon.co.uk/Corsair-CMPSU-430CXV2UK-Builder-Series-CX430V2/dp/B0057GTW56/ref=sr_1_1?s=computers&ie=UTF8&qid=1348161618&sr=1-1
The Antec 380 is the most efficient of the two.
None of them are going to be completely silent, but if you can hear them over your video card, then the video card fan probably isn't spinning.