Picked up a couple of the Sapphire 5700`s, XT for me as my R9 390 strix was artifacting for the last month or so and a vanilla 5700 for my son, no complaints at all with both these cards.
Mine is quieter than my 390 easily, even when ramped up, the 5700 for my son is also ideal because he is a "Kevin" (from Kevin & Perry) seriously he IS a Kevin!! so the blower is ideal, and is replacing a 7950 that was overheating (doughnut remnants in the case fans)
Noise for him is a non issue completely, he uses a gaming headset (glued to his head) and would not even notice if an earthquake hit and the house fell down around him.
(XT)In everyday use noise simply is not an issue, with the odd game I play there is no fan noise just a loudish whoosh of air, if it does get annoying I can stick it under water or I have a sapphire 290 cooler I could try, will not be trying the 390 cooler as that is worse than the stock cooler, both in cooling (vrm`s) and noise.
Only issue I have come across so far is that I tend to run a DVB-TV in a window most of the time and the resolution in that is fuzzy (like playing a low res game with no AA) nothing I tried will fix it so far, hope a driver update will fix this.