I bought a IBM ServerRAID m1015 card off eBay for about 100 bucks. It's PCI-e 8x but works in a PCI 16 slot just fine. It has 2 SAS ports and can handle 8 drives. It runs all 8 at 6gb. Works awesomely and is 100% stable. I also have the LSI equivalent and know that the LSI drivers and utility work with this card. The IBM drivers and utilities only work on Windows Server, not any of the clients OS's.
http://www.ebay.com/itm/IBM-ServeRaid-M1015-PCI-e-RAID-Controller-Full-Height-Bracket-46M0861-46C8933-/121227681741?pt=US_Server_Disk_Controllers_RAID_Cards&hash=item1c39bb9fcd