I usually always buy Western Digital HD's because that brand has never let me down yet. But as the cards lay on the table right now, it's hard to look away from the Samsung F1 series. They are the fastest 1 TB drives available, and even more they are also the quietest, coolest and cheapest.

Also, WDC does not (yet?) have a comparable product. They have their GreenPoint series which go up to 1TB, but those are 5400 RPM drives.