Can't address the Sandisk directly but I have been using 233x RiData 16GB cards available from frys.com for $60 and I am exceptionally happy with the price/performance. While not quite the same speed specs I doubt if I would ever notice the difference and they are a fraction of the price of the Sandisk.
I would not say "work extremely well" about the Transcend 133X: from your link it writes @ 9.607MB/sec while the max speed of the D700 is 35MB/sec. It will show on long bursts with the FPS slowing down as the buffer fills up.
Thu 28-Aug-08 09:56 AM | edited Thu 28-Aug-08 09:57 AM by davidnholtjr
I really could not say. I'm taking pictures and don't count/time how long it takes. I'm sure the big name cards are faster, but I don't have a problem with the speed of the card. I also have a Lexar 8GB 300x card and I really can't tell any difference in speed of the two cards.
A fast card also means faster photo browsing on the LCD. Make the test with a SanDisk Extreme III or up and a generic CF card. It takes a long time to go forward/backward on the pictures you've taken with a cheap card. So not only shooting speed is affected by low grade cards.
Also, you won't want to risk loosing pictures on the field with a lower quality card!
Multiple 4GB cards are cheaper than a single 16GB one, and it's better to lose a 4GB card than a 16GB one