hey guys going on a big trip in two weeks and I need to get some last minute stuff. I only have 2 1GB cards, I think I should get 2 2GB cards. Is there a certain brand I should use ( I have a canon 20d)? Prices for these cards are all over the place differing from 9.99 to 128.99. Also needing an extra battery, BP511A, where is the best place to get that the cheapest way?I went on ebay, but can I trust that?? Thanks in advance julie---home on a friday night on TPF!