I have bought my Canon Powershot A80 and now I am into digital cameras for the first time!! Can someone please advise me on Compact Flash Cards. I will be going abroad for 3 weeks later this year and will be taking, I suspect, an above average number of photographs but am puzzled as to the size of compact flash card which I should purchase to give me the best resolution knowing that I will not be able to download them until I return home. It would help also if someone could point me to where I could purchase the cheapest!!! Is there a difference also in quality between the various Manufacturers or are they all similar?