Ultra and Extreme Speed SD Cards?

hi people i have been looking at some high speed sd cards by sandisk and kingston. but not sure if they are compatible with the ipaq system. i understand that they are really for the digital cameras. here are the two different ones i am querying on.

EXTREME 1GB
http://www.flash-memory.co.uk/pp/Secure_Digital_Cards_(SD)/Sandisk_1GB_Extreme_III_SD_Memory_Cards.html

ULTRA 1GB
http://www.flash-memory.co.uk/pp/Secure_Digital_Cards_(SD)/Sandisk_1GB_Ultra_II_SD_Memory_Cards.html

will they both work and if so which one would be the best in performace and quality. remeber its fors data as well as maps and storage of pda data not just images.

thanks

[Charlie]

They will both work with your PDA but I'm not sure if you will get the benefit from the faster performance. I would confirm with Sandisk before shelling out he money as you can get 1GB SD card for about half that price in some places.