I purchased 3 refurbished lap tops from Dell over the last few years never a problem or a noticeable defect, I even sent back my XPS for dead pixels and they replaced the screen
I Have a couple of New WD PCI Raid cards Not sure if they are 1 or 2 http://forums.anandtech.com/messageview.aspx?catid=45&threadid=2029866&enterthread=y