Neither, I look here: http://www.proconsult.dk/katalog/m_sto/s_sto-hdd4/
As it has a physical shop, and is the cheapest in Denmark, for most single parts, but strangely enough, the most expensive for a full build.
Okay, so 500mb read speed is Sata 3, but how much could I squeeze out of a PCI-e...