Yesterday I got another 2 GB Lexar at 133 write speed. I prefer the 2 GB ones for the fear of losing too many imahges if something went wrong.
For sure!!! the faster write speed is worth the bucks.
Not sure if you notice it much shooting jpg, but 15-16MB files in RAW really need it.
So if that is the case I am sure whatever extra you paid Kort is well spent.

Have no fear on the card failing. I for one have not heard of it happening.
Provided you format it correct.
The larger ones come with a recovery software too.
 So far I have good luck with the  SanDisk Extreme III and the Lexar Professionals.
I would not want to experiment with other cards though.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."