Not CEE, studies have shown it to be less effective than monohydrate. Creatine nitrate would just provide benefits of nitrates, so if you wanted to go that route, just use creating monohydrate and a standalone nitrate source (potassium nitrate or something like that), that way you can dose the two independently how you want to. Creatine monohydrate is still just as effective as any other form, and cheap too. If your stomach handles it well, I see no real reason to go with anything more expensive really. No need to load either, it'll just take you a little longer to reach saturation.