Corsair has been around a lot longer than my time in the PC buying market. Ever since my first set of DDR value ram, I knew they were a quality company. The noobish mistakes I made with voltage and timings should have killed that PC3200, but it faired very well through all the abuse I gave it. Of course Corsair designs and builds other things aside from memory. They are also a leader in recommended power supplies to new builders. This all comes down to word of mouth, or word of test rather, recommendations from current users of their quality products.
Corsair Obsidian 800D Full Tower Chassis