I agree with Xemko - Western Digital makes the best hard drives out there - and they have a wide variety of drives:
Black drives - best performance - optimized for speed.
Green drives - saves electricity costs - great for backup drives.
Red drives - optimized for network storage (RAID) configurations
Blue drives - budget priced drives
The black drives are the best for performance - and come with a 5 year warranty. I use them in most applications for home use. The blue drives will save you a bit of money, but the warranty drops to 2 years, and the performance isn't as high. The green drives do well for backup drives. I use the green drives to backup data across my network nightly. They have high storage availability, but do not...