honestly, i am very surprised how stable my KR7A system has been. i have a pretty intense setup too, and it is just awesome. let me give you a taste:
SCSI controller with SCSI Zip, SCSI CD-RW, and SCSI DVD.
2x RAID 0 hard drives and 2x RAID 1 hard drives.
2x 256MB of DDR
XP 1600+ chip running at 1700+
Fastest mem settings, default voltage
running 24/7 for the past two weeks, no problems. i used to have a KT7A and it gave me fits. this guy is 100% more stable.
edit: i disabled the southbridge's IDE controller (no need for it, i use the Highpoint controller for my 4 hard drives), so that is one thing that may make my system more stable.