XFX Radeon HD5870 850 MHz 1GB ($439.00 Can) or Sapphire ATI Radeon HD5870 Vapor-X 870 MHz 1GB ($459.00 Can). There is only $20.00 different. I know the Vapor-X is OC and supposed to run cooler. Some say the fan is louder also, when at a high speed. I always have run XFX for the warranty and reasonable support. I don't really know much on Sapphire.