Unlike nVidia (only makes chips), ATI themselves make graphic cards under their supervision, as well they sell outn their graphic chips to manufacturers of video cards (called Add in board partners)
HIS being one of them, and as there are many, like sapphire, connect3d, asus. so I have seen ATi's own built more reliable in performance, as I have sold out couple of 100's original ATi built cards, and most of my buyers have bought in actula the same GPU card by some other manufacturer, and were having problems, and on getting Original ATi built, they didnt reported any.
other good manufacturers are:
Hercules (they stoped eventually)
Connect3D are OK as well,
WinFast (if they manufacture on ATi else I've seen there on nVidia, good cards)
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"