not quite sure which one but if you want total silence, then go for those with passive cooling. But those are usually lower end card so you will have to sacrifice some performance in order to achieve that. Or maybe you can go for water cooling
Its too hard to say which video is the most slient since different fans could be used on each card and the fan duty cycle could be different for each card.
3850 is probably the best among the 3. If it's fanless, then it's technically silent. But 3850 should be the coolest too.
I say grab any, and get yourself an aftermarket cooler such as an Arctic Cooling Accelero S1. Or just pick any that is marketed with a passive cooling heatsink