I will be using the SanDisk 16Gb SDHC Extreme Class 10 UHS-1 (max read/write = 45 MB/sec) in my coming 7100. I think that's as good a choice as any; you could go to 32 Gb at 45MB/sec, but the 8 Gb cards only reach 30 MB/sec. You (or I) don't need the Extreme Pro at 95 MB/sec.
Never criticize a man until you walk a mile in his shoes. Then you'll be a mile away and have his shoes!