need Socket 939 motherboard with 4 *working* SATA connections

For the past week I have been trying to get my motherboard (Gigabyte GA-K8N51GMF-9) to work. Actually most of it does work, except that when I access more than one sata drive at a time, the system becomes unstable / issues hardware errors. I've pretty much given up on this motherboard

Any suggestions for a new socket 939 motherboard with 4 *usable* SATA connections

Asus A8N-SLI, cant comment on the stability though cos I only use two of the 4 available SATA drive sockets http://www.newegg.com/Product/Product.asp?Item=N82E16813131517

HTH