I'm thinking of this card. Would this be fast enough? This card fits the 50 budget, is my 32gb that I wanted, and also seems fast enough to work good on the 7D... I hope. Carries the best $ per GB for the speed.
I use these: http://www.bhphotovideo.com …actFlash_32GB_Memory.html
Plenty fast and every bit as reliable as the Sandisks as near as I can tell.
One warning though, there's a slower variant that has an issue, this card here: http://www.newegg.com …aspx?Item=N82E16820208389
For most purposes it's an acceptable card with one annoying detail, when you try to format the card in the camera body it screws up the partition, for whatever reason it formats it as an 8GB card and wastes the rest of the space. I had to download a specific utility from Transcend to set the partition straight. If I format the card through the PC/card reader it works fine, but the 7D just can't format it natively.
The 400x version has no trouble in this regard.