JohnTrav
No longer a newbie, moving up!
Any sandisk fast card will do. The 7d has a great buffer so unless you are pressing the shutter and hoping for the best you should be ok. Probably there are 10 more good brand names that would also do the trick. I dont however recommend a 32gb card. Go for a few 8gb. You may have to change out a bit more but if in the unlikely event one fails (all eggs in one basket). If you shoot raw the 7d has a medium raw setting that makes a 10gb file also. this also is not the best way to go but might be ok for non critical parts of the day
As for back up, your 1000d will likely be as good image wise in good light, the 7d better in lower light. It may help to have a lens mounted on both for convenience. Good luck
I just decided to get two 32gb ones because I found very good offers on them, not scandisk but they will work fine, good reviews and all that! I usually shoot candid, photographing people they either don't want their photo taken, or are unaware, so this is going to be quite a bit different! I love my little 1000d, but it feels like a toy compared to the 7d haha! Cheers
I have SanDisk cards and transcend. They all work the same. In my opinion they are both just as good of quality and the transcend was a lot cheaper and I also bought on amazon too. Glad to here you picked up two cards. The photographer at my brothers wedding said he walked out with over 1000 pictures so you will need the space. I'm sure he was a little happy with the shutter release button.