Any PSU brand in Tier 1:
Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2
Personally, have had good experience with CorsairAX/Season X series (750 - 850W) and Antec HCP Platinum 1kW, but that is a bit of an overkill for your R9 280X, unless you can get a really good deal on it or you are planning on pushing your system with a heavy workload/OC.