$100 for both seems like a decent deal...$100 for each, not so good. Beware, I have not heard that many great things about Maxtor, so you might want to check them out.
Everybody that I know loves them. I have a ton of Maxtor drives from 1999-1998, all of them still work, while others have failed. They are a subsidiary of Seagate (I think) now.
No, I'm going to buy two so I can get a bunch of extra space for HD movies and put them in Raid 1. I backup all of my stuff. So redundancy isn't a huge issue.