Okay. I have another CF question. (I know, I know.) I decided to go with Sandisk because of the pricing and reputation. I'm looking to invest in about 3 cards. I was first looking at the 2 GB Ultra II. Then I check out the price for the Ultra III and found its having a good rebate. However the more research I did ultimately I saw that the Ultra IV is having an AMAZING rebate making a 4GB cf card only 36.61 a piece. So whats the question? First off I'm reading that its for "high end cameras" and I'm wondering if my camera would be compatible? Or is that even an issue? I have a Canon Rebel EOS Digital XT. And because this is a mail in rebate I'm going to be out of pocket for a couple months. I could probably afford it but is it worth it? (I would just wait to get some other things on my "wish list") I'm also comparing the features with the III and the IV but I'm not seeing a huge difference other than speed. But another thing I'm wondering is if soon the technology will be out dated on the III and the IV is going to be current. Or is that even a consideration? Is there anyone with both of these cards? I'm sorry for all these questions but I do want to make a good investment without being over the top. I appreciate your information and advice!!!!