Get Lexar 200X at B&H Photo.
My favorite card for the past year or so has been the Lexar 2000X SDXC 64GB. It’s blazingly fast for downloads (and in the camera):
Lexar 2000X SDXC 64GB is now $78 ($17 instant savings).
I’d much rather have 128GB cards than 64GB cards, but the price per GB is about 1.9X more costly, as is usual for the latest high-capacity cards.
Still, the 128GB cards make a lot of sense for someone who shoots like I do (a week or longer out in the field): I don’t like to have to erase any cards until everything is backed-up back at home, nor do I like having a video clip cut off abruptly because I wasn’t paying attention to capacity utilization. With a higher capacity card, the download speed becomes more important, so the Lexar 2000X SDXC cards are appealing.