Ok. I have been wondering about any of these mATX boards with 6 SATA ports. I have only ever owned Asus motherboards so don't really know ASRock or which of these might have issues with unRAID.
ASRock B85M-GL ($65 CDN after rebate)
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813157375
- Atheros LAN, 6 SATA ports, 1 x PCIe x16, 1 x PCIe x1, 1 x PCI
ASRock B85M-Pro4 ($75 CDN after rebate)
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813157388
- Intel LAN, 6 SATA ports, 2 x PCIe x16
Gigabyte GA-B85M-HD3 $75 CDN
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813128608
- Realtek LAN, 6 SATA ports, 1 x PCIe x16, 2 x PCIe x1, 1 x PCI
ASRock H87M ($85 CDN after rebate)
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813157385&AID=10657534&PID=3938566&SID=&nm_mc=AFC-C8junctionCA
- Atheros LAN, 6 SATA ports, 2 x PCIe x16
Asus B85M-G ($89 CDN)
http://www.newegg.ca/Product/Product.aspx?Item=N82E16813131986
- Realtek LAN, 6 SATA ports, 1 x PCIe x16, 2 x PCIe x1, 4 DIMM slots, some other features (useful?)