Can't speak for the rest, with the AC Xtreme, if you don't add voltage/+/or oc much, the AC
should be ok.
The Xtreme will be quieter/cooler than
any AIB custom cooled R9's imo.
Iv'e used 5870/6950/7970/50's under AC Xtremes with supplied heatsinks on the vrms and they all managed vrm temps ok with voltage+high oc's except for the 7970, it needed the big Alpenfon VRM sink as temps got too high-but that requires you to mod the Xtreme(cut part of the heat fins off).
I never tested stock sinks on the 290X vrms, I just went straight for the kill with the BEAST.
Now running my original AC 5870 Xtreme on top of my 290X with Alpenfon VRM sink with BF4 sitting@~57c max@1100/1350 with AB custom fan profile/3 X system fans set on low.
The interesting part but more impressive(due to the high core temps in regards to stock blower) is, the 290X core is running cooler than the 7970/50's
ever managed.
£38+£11 bracket direct from AC.
£49 has now custom cooled 5870/6950/7970/7950's/290X!
Still going strong and silent, that cooler is Legendary.