I have used at least 10 brands, and can honestly say they all do the same thing. The best brand is the cheapest. As long as it's 100% creatine monohydrate, name brand means squat. I get 2.2lbs for about 25 bucks and it does the exact same thing as any name brand BS with expensive marketing and bodybuilders flexing on the front.
If you want to know where I shop just let me know in a PM. It's not hard to find cheap.