[gTen]

There are other brands as well like RiData, PQI and Dane Electric oh and Top Ram...that said brands don't matter too much, A-Data, Top Ram, Transcend and Kingston are usually ones that are found on ebay so if you order from a unknown place you may get a fake one which will be same but lower quality.

Otherwise they are all the same...they all got life time warranties. The process for making SD cards is pretty generic so unless your getting a higher end card like 166x and etc, you won't notice the difference between brands.

As for price, I wouldn't pay 50$ for a class 2 when you can get a class 6 easily for 50$

On a good deal you can get a 16gb class4-6 for 30-35 bucks