I use ProLab brand, and I get it from dpsnutrition.com. About $20 for a kilo. It is CreaPure SKW, but it is not micronized. Micronized creatine has only been hypothesized to have a slightly greater uptake in the GI, and hence, be gentler on the stomach. There is really no evidence whatsoever that this is true. The true advantage in using micronized is that it mixes better into a drink. I have found that non-micronized does not settle in shakes, however (e.g. Grow! or Surge). At times, I do mix creatine into Surge, but if I’m simply taking it with juice or water (i.e. it is an off-day), I just put the dry powder into my mouth, take a sip of the desired chaser, and swallow. On a related note, pure creatine should be flavorless.
Good luck! If you do, however, want micronized creatine, AST supposedly makes a fine product.