As the new Panasonic GH4 (and other 4K cameras) start shipping, your typical SD card may work for 1080p resolutions, but If you've been waiting to shoot 4K Video as soon as your camera hits your doorstep you'll need media that packs in whopping speeds.
The new Sandisk Extreme Pro SDHC and SDXC media are optimized for UHS-II Devices, holds a speed class rating of UHS Class 3. Rated at a Max. Read Speed: 280 MB/s and Max. Write Speed: 250 MB/s, these are going to be cards required to take advantage of that 4K data rate. The speed of these cards will also greatly benefit you when it's time to dump or backup the data from the card, so you can get back to shooting.
I'm actually using mostly Transcend media in ALL my cameras, and the 32GB SDHC Class 10 can handle video mode in the Canon 5D Mark III with ease, and it's on sale today for just $16.99 right now (click here).
Jeremy shares a link to the discounts on Sandisk today [thanks Jeremy]. If you have a preference for the brand, the Sandisk 32GB SDHC Class 10 Media card now comes in at a few dollars cheaper than the Transcend 32 GB Class 10 SDHC. For compact flash media, I still think Transcend has the better deals, but everyone has their preferences. Check out the sale at Amazon (Click Here).
I thought $1 dollar/GB was affordable just a few months ago, but now prices on these Transcend 32GB Class 10 SDHC cards are down even further. These are a main staple of media we use in all of cameras and have been highly reliable. I consistently throw them into any point and shoot camera, camcorder, and even shoot video through the 5D Mark III with these. If you're in the need for new SDHC media, check it out. Currently a Transcend 32GB SDHC Class 10 card will only run you $20 dollar via B&H (Click Here)
Not sure if you'll find much, but the Sandisk Media sale ends today so you might want to give it another look through. When the price is right, i'll choose Sandisk over Transcend media, but for the most I can live off of Transcend retail prices when i'm in need of new cards. The only thing I see of interest for sale today is the Sandisk 128GB SDXC Class 10.
I currently have a Lexar 128GB SDXC card that i've been throwing in all of my point and shoot cameras, as well as all my DSLR cameras. The new Canon 5D Mark III also accepts SDXC media and we've done quite a few shoots with just the 128GB with no issues. I also use this SDXC card as my portable external drive. If for some reason you need a card this large, the Sandisk 128GB SDXC is cheaper than the Lexar 128GB in today's sale. Check it out at B&H (click here).