Anyway, I solved that problem with a new power supply... thank goodness. So time to pay more attention and pay more for a more reliable external storage solution. I ultimately want to get a good RAID5 or even RAID10 solution but they are expensive. For now, I would settle for a mirrored solution.
I decided to go with the newly released, Western Digital MyBook Studio Edition II 2TB Quad Interface. It comes with a dual drive (1TB each) setup in RAID0 formatted for HFS+ (Mac OS-X) but I would be using it in Windows Vista Ultimate x64 and in RAID1.
The things that made up my decision were the eSATA interface, the excellent design, the ease of service if a drive fails and the capacity and RAID1. Price is a little high but B&H has them for $464.00.
http://www.wdc.com/en/products/products.asp?driveid=410
Here are some benchmarks using FireWire 400 and eSATA connections. My PC isa custom built Asus Striker Extremewith Intel QX6700 and 4GB RAM. The eSATA is a Silicon Image chipset built into the MoBo.
FW400
eSATA