$100

25€

That's the one BS has.

71.35€

"We expect new products to outperform their predecessors, and this one does. If we compare the new WD Scorpio Blue 500 GB with its 320 GB forerunner, the new one is significantly faster and more efficient, and it is even cheaper, as drive prices have been decreasing. However, the Scorpio Blue also outperforms all of its 5,400 RPM competitors, with very few exceptions, and we found that it is about as fast as a 2-year old 750 GB Seagate 3.5” desktop hard drive."

"...our clear favorite of the bunch. That favorite? Western Digital's Scorpio Blue. We subject drives to a varied mix of performance tests because we're looking for weaknesses, and the Scorpio Blue exhibited none. It may not have come out ahead of the pack in each and every test, but over our entire suite, the Scorpio was clearly the performance leader. At just $90 online, the Blue won't cost you more than other drives we've looked at today, either. Picking an Editor's Choice doesn't get any easier than that."

This is the hard drive that came with my MacBook.