I'm looking for a server with SATA RAID 1 HD setup, where the CPU usage on HD access is as close to zero as possible. I'm planning on using a pair of Raptor HD, as they appear to be the fastest SATA HD available. The question is what kind of SATA controller I need to ease the load on the CPU. I am currently considering using a motherboard with Intel's integrated ICH5R SATA controller onboard. Is this acceptable in terms of low CPU usage, or would I benefit from choosing a different SATA controller? If yes, which one would you recommend?