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I buy my Mac's stripped down, bone stock with exception to processor version and then max them out with drives and ram from OWC. I have had ram go bad, sent my SSD in for a firmware upgrade. In return I get brand new sets of ram and they even gave me a brand new SSD instead of the old one with firmware, they are truly above and beyond in product support and customer service, I don't bother with anyone else...
That said, I do regular backups of my boot drives via Time Machine and off site storage, my intel 160GB has been faultless in my MacBook Pro as well...