First off, a little history on creatine. Creatine was discovered by Michel Eugène Chevreul around 1832. He discovered it as a component of skeletal muscle in which he later named creatine after the Greek word; "Kreas" meaning flesh. He also found that creatine is a nitrogenous organic acid that naturally occurs in vertebrates and helps to supply energy to muscle cells, so with that said...
High quality creatine monohydrate formulas have quickly become a must-have for any serious bodybuilder.
By combining pure creatine monohydrate, the high glycemic, insulin-releasing carbohydrate dextrose, and sodium from sodium phosphate (a critical nutrient for proper creatine transport), along with a few other enhancers, these products have made creatine supplementation easy, exact, and inexpensive.
Phosphagen HP from EAS was one of the first creatine monohydrate drinks, and it's still a good supplement.
Creatine HSC from AST Research is a personal favorite; it mixes up easy and tastes great. I hear from a lot of people who say they never really made big gains on creatine until they started using this product. And now AST Sports Science uses only Micronized Creatine in all their Creatine HSC products. It's definitely top notch.
MuscleTech's Cell-Tech is an extremely potent creatine formula, with twice the usual amount of creatine per serving (a full 10 grams). Cell-Tech has a very loyal following. Combining Cell-Tech with MuscleTech's other top products Anotesten and Nortesten (New, improved formula) makes for one hell of a Super Stack.
HDT's creatine drink called CLF-5000 is made without the use of Aspartame and is an excellent choice for those seeking to avoid artificial sweeteners
Any of these supplements listed will help you maximize creatine uptake, and more creatine in the muscles generally means more muscle cell volume and more explosive power.