If you use ShowAnalyzer then WD Black SATA III w/ 64MB cache is definitely the way to go.
I’m testing a few other drives now that I’ve moved my SA to my server. Right now I’m deciding between a WD AV-GP WD20EURS 2TB /SATA II w 64MB Cache and WD Caviar Blue WD10EALX 1TB SATA II w/ 32MB Cache for my primary HTPC.
The Blue is much cheaper and SATA III versus SATA II but the lower cache concerns me for my usage.
