I've really liked the Seagate Momentus Hard Drives of late. They are fast, do pretty well on temps and battery, quiet - generally, and have a 5 year warranty. The WD Scorpio is not bad either. If price is no object, though, I'd go ahead and go SSD. No moving parts to damage from movement, such as being dropped; and at least generally faster than spindle drives.
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"If to err is human, then I must be some kind of human!" -Me