I need more CF Card SPACE!!! I went out and did some shooting (pictures to be posted later), and my 512MB Card filled up so fast. I am using a Sandisk Ultra II.....should I stick with one brand, or move to a different brand? Eventually, I will be getting a 1GB or 2GB. Not sure which is the best card to get for the money........HELP!!! :? :? :? :? :? :?