I'll start with the obvious. If that is what you want to do, the more expensive cards are worth it. Using an average file size of 22 MP at 10 fps, you will be generating data at 220 MB/sec. You will, at best, be writing to the cards at 90 MB/sec. So, the faster cards (Lexar 1000x or Sandisk extreme pro) will let you shoot longer before you fill up your buffer.Originally Posted by wildstraw
On the difference between between SD cards and CF cards. My understanding is that CF cards have long been considered the superior card for years but that SD cards have either closed that gap or are close to closing the gap. SD cards have a huge advantage in that they are small and are more commonly used. So, due to some economies of scale, more are produced, the fixed production costs are spread over larger volumes, SD cards are cheaper per MB.
These are now probably dated, but here are two links from 2010 talking about actual write rates of SD and CF cards on a Canon 1DIV:
http://www.slashgear.com/sdhc-flash-...rk-iv-2082467/
http://www.slashgear.com/high-perfor...rk-iv-1577718/
Brant
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