Hey there. You can't get an A2 for the price of C1. I believe C2 to C1 is valid, so make sure you get the C2 price if you stick with the C1 choice. There is a chart that details the one-category upgrade program, but I am not sure if it is on Celebrity's website or if it was posted on here. Somebody on here should come up with it for you. Not usually a huge price difference, but something you as a Captain's Club member are entitled to, nonetheless. So excited for you and your plans to visit your 50th state.