The GoPro HD Hero 2 states on the FAQ page:

You will need to get a class-4 or higher SD card from a reputable brand and source in order to use the camera effectively. A class-10 SD card is recommended when using Time-Lapse mode or photo every 0.5 seconds.

Class 4 isn't that fast by today's standards, and actually equates to 4MB/s read/write speeds. The two cards you pointed out are compatible with SDHC, but are much much faster, and even way out of the current class leagues. They rate them as 300x or 45MB/s read/write.

In other words, you wouldn't have any problem using those memory cards, but from what I can tell they would be overkill. I would just pick up any standard Class 10 card and you should be covered for all situations the camera is capable of.

One thing that may be worth mentioning is the two SandDisk Extreme Pro cards that you pointed out do state that they have "extreme durability" with temperature proofing, water proofing, and shock proofing - all things which you may benefit from in extreme conditions.