Long time reader, previous 70D owner, current 5DIII owner.
Just wanted to throw this out there. I bought one of the ProMaster 1000X CF cards and was getting around 60-70Mb write speeds. I was anxious to get something and this was all they had at my local shop in north Texas. @ $200 with that type of speed, I said F that and returned it. Just an FYI for anyone wanting to try that brand. And I suppose that others may be faster than what I received, but there is obviously other/cheaper options available. Currently waiting on a 1066X KB card.