Who Makes The Best RAID Controller?

thonot asks: "I build PC's from my home, generally for frinds and friends of friends. Yesterday though, my wife's boss called me and asked if I could build him a bussiness PC. The only problem is that he wants a RAID0 configuration w/ 3 Seagate Cheetah 18.4 Gig 15k RPM SCSI drives, and I've never even seen a RAID controller, well except in pictures. Can anyone point me in the direction of a good controller card?"