I have just bought an HP IPAQ HX2750 Pocket PC. Can you please suggest whether I should buy a compact flash card or SD card for extra memory as I have a choice of both? Also I notice that you can get different speeds for CF? ie x12 x20 x40 - which one do I need for my PDA? all the guides only talk about camera's not PPC. thank you for any help you can give me!