I bought 2 Integral 4GB SDHC Class 6 Ultima Pro Card from Amazon.fr though a friend of mine. These Integral SDHC Class 6 Ultima Pro Cards are not available in Amazon.com of those are available only in Amaozn europe sites. I bought these cards to use for my Canon SX10 IS camera with CHDK. I needed 4GB cards because thats the limit you can use for CHDK. Also I wanted to by the fastest avaliable speed limit so I bought these Integral 4GB SDHC Class 6 Ultima Pro Card.
I can't say I'm happy with their speed. They are not faster than my Laxer 2GB SD card or Transcend 4GB SD cards. I don't know if this Integral 4GB SDHC Class 6 Ultima Pro Cards have same speed or less. But they are not faster. I have the lag which I get from my old SD cards.
So Buy a good class10 SDHC card or 2 for your Canon SX10 IS camera and If you want to use CHDK for Canon SX10 IS then buy several 4GB class10 SDHC cards. 2GB would be better but you won't find 2GB class10 SDHC memory cards. few good options are,
- Sandisk 4GB Class10 Extreme III SD Card - $31.93
- Transcend 4GB Class10 SDHC Card - $10.80
- Panasonic 4GB Class10 SDHC Card - $26.50