which RAID setup for work PC

[One_Hertz]

I ran Raid 5 with 4 raptors for about a year on ICH9 and I had no problem... Performance was as it was to be expected.

I am not attacking anyone, I just don't see the point for HDDs. If the OP feels strongly about the Sandy Bridge Sata port scares, then I would get some very cheap ($100) RAID card and call it a day. The performance of a RAID card is not something that you need to take very seriously for only 3 HDDs because there won't be much difference in either case.

edit: for ex. look at this cheapo highpoint card go:

http://www.newegg.com/Product/Produc...82E16816115050
$80

Capable of 300+mb/s in Raid 5...
http://www.tomshardware.com/reviews/...nt,2101-9.html

All the OP needs.

edit2: Buy a cheap raid card for $100 and use the other $200 on an SSD! You would be infinitely better off than with a $300 Raid card for your HDDs.