Hi folks, she who must be obeyed has given me permission to buy a new PC since my current one is 18 months old. I specifically want to upgrade because my motherboard failed last week and I can't get the second raid set to work on the replacement. But anyway. I use the PC to run my business, so it is absolutely critical that it is quick and reliable. I also enjoy 1st person shooters on a daily basis. Since I've had recent problems with RAID1, I'm looking for a system which, if the processor, or motherboard, or a hard disk goes bang, I can replace the broken bit and continue with a working system with very little effort. At the moment I have the following compiled for the spec: AMD Athlon 64 (ADA4200BVBOX) X2 4200+ socket 939 Dual Core 2.2ghz 512kb and 512kb Cache Gigabyte GA-K8NXP-SLI Skt939 nForce4 SLI Chipset DDR400 PCI-E USB2.0 LAN SATA Retail Box Crucial DDR PC3200 • CL=3 • UNBUFFERED • NON-ECC • DDR400 • 2.6V • 128Meg x 64 (2 gig) How does this spec sound to you? I'm looking at the Western Digital 150 Gig SATA I Raptor Vs the WD 500 Gig SATA II which are about the same price. Which would be faster? And lastly how would you set up this system so that if a vital component went down, I could recover? Buy two identical PCs sharing external drives which are backed up nightly? Thanks in advance.