Photo 5 wrote:
What I would do is buy the faster card you can afford, ...
There is a lot of wisdom in that, but the expensive UDMA cards (266X, 300X, etc.) can be a different story.
I bought a couple UDMA cards even though my dSLR doesn't support UDMA. They work as fast as my fastest non-UDMA cards when shooting JPEG, but when shooting RAW, they are slower than my slowest non-UDMA cards. So while gettting a fast card is usually a good idea, you may not want to overdo it.