Fry's Electronics, OfficeMax, Office Depot, Staples, or Best Buy
because of their 100% money back guarantees (I don't know about Circuit
City's policy, which recently changed), unlike CompUSA, which charges
15% on opened packages (sometimes whether they were really opened or
not). Fry's is often the cheapest, after rebate, but either Staples or
OfficeMax occasionally offer a drive for a really low prices without a
rebate.