Personally, I've never found anything that works better than regular creatine monohydrate. However, I have heard good things about Creapure. I know Riskybizz007 likes it a lot and he's pretty knowledgeable with supplements (don't tell him I said that).
Creapure is just a more pure, micronized (dissolves very easily) version of creatine monohydrate. I can definetly recommend it, works like it should. I've never heard of trac so I don't know which is better, but I like creapure...
Creapure is the best, in my opinion. It is very micronized and is very easily absorbed, as opposed to cell-tech. Kaizen creatine contains creapure and is cheap, like 30$ a bottle. Tastes good too.