Actually, $1K isn't too bad, considering it's an external. Maxtors 300GB external (about the only Maxtor I'd ever buy, and then only because it's the only 300GB drive out) is about $300. And you get a boast in performace (in theory, anyway) since it's really a RAID setup. Wonder how hot this thing gets, though?
But, given the current prices of internal drives (250GB/$133), then it's not so attractive. But then, I wouldn't want 4 HDD's in my system (had 5 drives once. Been there , done that, ain't doing it again). I wouldn't go over 3 drives in a system now.
Wonder what kind of HDD's they use, though?