For motherboards and graphics cards I always buy Gigabyte,. The only reason why my current mobo is an Asrock is because there weren't any available to preorder at launch for a reasonable price. I have bought a total of 18 Gigabyte motherboards and 5 Gigabyte graphics cards and none of them have given me any trouble. For PSUs I'm a free spirit, buying from the one that's cheapest and has decent reviews, but I tend to favor Corsair a bit, not even for all the flack the original RM and CX series have gotten through the years, and they are all working fine in clients' PCs and also in mine.