Hi, quick question, I've left this a bit late but we'll see what sort of answer I can get before I have to leave. I'm looking to buy a memory card for my Canon 550D, not neccesarily from amazon, but it's just where I've gone to get examples of the ones I'm looking at. My main questions are, being my first dslr I'm a beginner with this all, so am I going to notice a difference in write speed? Aside from that, I don't see a difference in these two cards except one says it can record HD video, which I'm going to assume the other one does as well but is just a marketing gimmick. Also, I've heard that larger cards can be slower, would it be better to get a couple of 8GB as opposed to the 16GB that I've linked to here?

http://www.amazon.com/SanDisk-16GB-...80280093&sr=1-2
http://www.amazon.com/SanDisk-16GB-...80289156&sr=8-6