I may have overpaid for the San Disk Extreme Pro 95MB/s. When I have shot by holding my finger on the shutter release for about 15 seconds, I never had a slowdown or noticeable buffer problems. I was shooting highest MP NEF (To Card-1) plus highest MP JPG (To Card-2).
I just can't see trying to skimp on memory cards when shooting $2K + worth of camera/lens, etc. Would you try to find the cheapest possible spark plugs and gas for your Ferrari? "Hey, would you guys mind getting everyone back together so that I can take those wedding photos again?"